29 files changed, 781 insertions, 280 deletions
diff --git a/OpenSim/Region/Application/Application.cs b/OpenSim/Region/Application/Application.cs
index c130038..ebfebc4 100644
--- a/OpenSim/Region/Application/Application.cs
+++ b/OpenSim/Region/Application/Application.cs
@@ -92,9 +92,14 @@ namespace OpenSim
                m_log.Info("[OPENSIM MAIN]: configured log4net using default OpenSim.exe.config");
            }
-            m_log.DebugFormat(
+            m_log.InfoFormat(
                "[OPENSIM MAIN]: System Locale is {0}", System.Threading.Thread.CurrentThread.CurrentCulture);
+            string monoThreadsPerCpu = System.Environment.GetEnvironmentVariable("MONO_THREADS_PER_CPU");
+            m_log.InfoFormat(
+                "[OPENSIM MAIN]: Environment variable MONO_THREADS_PER_CPU is {0}", monoThreadsPerCpu ?? "unset");
            // Increase the number of IOCP threads available. Mono defaults to a tragically low number
            int workerThreads, iocpThreads;
            System.Threading.ThreadPool.GetMaxThreads(out workerThreads, out iocpThreads);
@@ -109,7 +114,6 @@ namespace OpenSim
            // Check if the system is compatible with OpenSimulator.
            // Ensures that the minimum system requirements are met
-            m_log.Info("Performing compatibility checks... \n");
            string supported = String.Empty;
            if (Util.IsEnvironmentSupported(ref supported))
            {
diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
index 1fa5ec0..2bb60d5 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
@@ -257,16 +257,20 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
            lock (sp.AttachmentsSyncLock)
            {
-                foreach (SceneObjectGroup grp in sp.GetAttachments())
+                foreach (SceneObjectGroup so in sp.GetAttachments())
                {
-                    grp.Scene.DeleteSceneObject(grp, false);
+                    // We can only remove the script instances from the script engine after we've retrieved their xml state
+                    // when we update the attachment item.
+                    m_scene.DeleteSceneObject(so, false, false);
    
                    if (saveChanged || saveAllScripted)
                    {
-                        grp.IsAttachment = false;
+                        so.IsAttachment = false;
-                        grp.AbsolutePosition = grp.RootPart.AttachedPos;
+                        so.AbsolutePosition = so.RootPart.AttachedPos;
-                        UpdateKnownItem(sp, grp, saveAllScripted);
+                        UpdateKnownItem(sp, so, saveAllScripted);
                    }
+                    so.RemoveScriptInstances(true);
                }
    
                sp.ClearAttachments();
@@ -297,6 +301,15 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
 //                m_log.DebugFormat(
 //                    "[ATTACHMENTS MODULE]: Attaching object {0} {1} to {2} point {3} from ground (silent = {4})",
 //                    group.Name, group.LocalId, sp.Name, attachmentPt, silent);
+                if (group.GetSittingAvatarsCount() != 0)
+                {
+//                    m_log.WarnFormat(
+//                        "[ATTACHMENTS MODULE]: Ignoring request to attach {0} {1} to {2} on {3} since {4} avatars are still sitting on it",
+//                        group.Name, group.LocalId, sp.Name, attachmentPt, group.GetSittingAvatarsCount());
+    
+                    return false;
+                }
    
                if (sp.GetAttachments(attachmentPt).Contains(group))
                {
@@ -357,30 +370,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                group.AttachmentPoint = attachmentPt;
                group.AbsolutePosition = attachPos;
-                // We also don't want to do any of the inventory operations for an NPC.
                if (sp.PresenceType != PresenceType.Npc)
-                {
+                    UpdateUserInventoryWithAttachment(sp, group, attachmentPt);
-                    // Remove any previous attachments
-                    List<SceneObjectGroup> attachments = sp.GetAttachments(attachmentPt);
-    
-                    // At the moment we can only deal with a single attachment
-                    if (attachments.Count != 0)
-                    {
-                        if (attachments[0].FromItemID != UUID.Zero)
-                            DetachSingleAttachmentToInvInternal(sp, attachments[0]);
-                        else
-                            m_log.WarnFormat(
-                                "[ATTACHMENTS MODULE]: When detaching existing attachment {0} {1} at point {2} to make way for {3} {4} for {5}, couldn't find the associated item ID to adjust inventory attachment record!",
-                                attachments[0].Name, attachments[0].LocalId, attachmentPt, group.Name, group.LocalId, sp.Name);
-                    }
-    
-                    // Add the new attachment to inventory if we don't already have it.
-                    UUID newAttachmentItemID = group.FromItemID;
-                    if (newAttachmentItemID == UUID.Zero)
-                        newAttachmentItemID = AddSceneObjectAsNewAttachmentInInv(sp, group).ID;
-        
-                    ShowAttachInUserInventory(sp, attachmentPt, newAttachmentItemID, group);
-                }
    
                AttachToAgent(sp, group, attachmentPt, attachPos, silent);
            }
@@ -388,6 +379,30 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
            return true;
        }
+        private void UpdateUserInventoryWithAttachment(IScenePresence sp, SceneObjectGroup group, uint attachmentPt)
+        {
+            // Remove any previous attachments
+            List<SceneObjectGroup> attachments = sp.GetAttachments(attachmentPt);
+            // At the moment we can only deal with a single attachment
+            if (attachments.Count != 0)
+            {
+                if (attachments[0].FromItemID != UUID.Zero)
+                    DetachSingleAttachmentToInvInternal(sp, attachments[0]);
+                else
+                    m_log.WarnFormat(
+                        "[ATTACHMENTS MODULE]: When detaching existing attachment {0} {1} at point {2} to make way for {3} {4} for {5}, couldn't find the associated item ID to adjust inventory attachment record!",
+                        attachments[0].Name, attachments[0].LocalId, attachmentPt, group.Name, group.LocalId, sp.Name);
+            }
+            // Add the new attachment to inventory if we don't already have it.
+            UUID newAttachmentItemID = group.FromItemID;
+            if (newAttachmentItemID == UUID.Zero)
+                newAttachmentItemID = AddSceneObjectAsNewAttachmentInInv(sp, group).ID;
+            ShowAttachInUserInventory(sp, attachmentPt, newAttachmentItemID, group);
+        }
        public ISceneEntity RezSingleAttachmentFromInventory(IScenePresence sp, UUID itemID, uint AttachmentPt)
                {
                        return RezSingleAttachmentFromInventory(sp, itemID, AttachmentPt, true, null);
@@ -721,79 +736,17 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
            //                "[ATTACHMENTS MODULE]: Called AddSceneObjectAsAttachment for object {0} {1} for {2}",
            //                grp.Name, grp.LocalId, remoteClient.Name);
-//            Vector3 inventoryStoredPosition = new Vector3
+            InventoryItemBase newItem
-//                   (((grp.AbsolutePosition.X > (int)Constants.RegionSize)
+                = m_invAccessModule.CopyToInventory(
-//                         ? (float)Constants.RegionSize - 6
+                    DeRezAction.TakeCopy,
-//                         : grp.AbsolutePosition.X)
+                    m_scene.InventoryService.GetFolderForType(sp.UUID, AssetType.Object).ID,
-//                    ,
+                    new List<SceneObjectGroup> { grp },
-//                    (grp.AbsolutePosition.Y > (int)Constants.RegionSize)
+                    sp.ControllingClient, true)[0];
-//                        ? (float)Constants.RegionSize - 6
-//                        : grp.AbsolutePosition.Y,
-//                    grp.AbsolutePosition.Z);
-//
-//            Vector3 originalPosition = grp.AbsolutePosition;
-//
-//            grp.AbsolutePosition = inventoryStoredPosition;
-            // If we're being called from a script, then trying to serialize that same script's state will not complete
-            // in any reasonable time period.  Therefore, we'll avoid it.  The worst that can happen is that if
-            // the client/server crashes rather than logging out normally, the attachment's scripts will resume
-            // without state on relog.  Arguably, this is what we want anyway.
-            string sceneObjectXml = SceneObjectSerializer.ToOriginalXmlFormat(grp, false);
-//            grp.AbsolutePosition = originalPosition;
-            AssetBase asset = m_scene.CreateAsset(
-                grp.GetPartName(grp.LocalId),
-                grp.GetPartDescription(grp.LocalId),
-                (sbyte)AssetType.Object,
-                Utils.StringToBytes(sceneObjectXml),
-                sp.UUID);
-            m_scene.AssetService.Store(asset);
-            InventoryItemBase item = new InventoryItemBase();
-            item.CreatorId = grp.RootPart.CreatorID.ToString();
-            item.CreatorData = grp.RootPart.CreatorData;
-            item.Owner = sp.UUID;
-            item.ID = UUID.Random();
-            item.AssetID = asset.FullID;
-            item.Description = asset.Description;
-            item.Name = asset.Name;
-            item.AssetType = asset.Type;
-            item.InvType = (int)InventoryType.Object;
-            InventoryFolderBase folder = m_scene.InventoryService.GetFolderForType(sp.UUID, AssetType.Object);
-            if (folder != null)
-                item.Folder = folder.ID;
-            else // oopsies
-                item.Folder = UUID.Zero;
-            // Nix the special bits we used to use for slam and the folded perms
-            uint allowablePermissionsMask = (uint)(PermissionMask.Copy | PermissionMask.Transfer | PermissionMask.Modify | PermissionMask.Move);
-            if ((sp.UUID != grp.RootPart.OwnerID) && m_scene.Permissions.PropagatePermissions())
-            {
-                item.BasePermissions = grp.RootPart.BaseMask & grp.RootPart.NextOwnerMask & allowablePermissionsMask;
-                item.CurrentPermissions = grp.RootPart.BaseMask & grp.RootPart.NextOwnerMask & allowablePermissionsMask;
-                item.NextPermissions = grp.RootPart.NextOwnerMask & allowablePermissionsMask;
-                item.EveryOnePermissions = grp.RootPart.EveryoneMask & grp.RootPart.NextOwnerMask & allowablePermissionsMask;
-                item.GroupPermissions = grp.RootPart.GroupMask & grp.RootPart.NextOwnerMask & allowablePermissionsMask;
-            }
-            else
-            {
-                item.BasePermissions = grp.RootPart.BaseMask & allowablePermissionsMask;
-                item.CurrentPermissions = grp.RootPart.OwnerMask & allowablePermissionsMask;
-                item.NextPermissions = grp.RootPart.NextOwnerMask & allowablePermissionsMask;
-                item.EveryOnePermissions = grp.RootPart.EveryoneMask & allowablePermissionsMask;
-                item.GroupPermissions = grp.RootPart.GroupMask & allowablePermissionsMask;
-            }
-            item.CreationDate = Util.UnixTimeSinceEpoch();
            // sets itemID so client can show item as 'attached' in inventory
-            grp.FromItemID = item.ID;
+            grp.FromItemID = newItem.ID;
-            return item;
+            return newItem;
        }
        private void DetachSingleAttachmentToInvInternal(IScenePresence sp, SceneObjectGroup so)
@@ -802,7 +755,10 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
            m_scene.EventManager.TriggerOnAttach(so.LocalId, so.FromItemID, UUID.Zero);
            sp.RemoveAttachment(so);
-            m_scene.DeleteSceneObject(so, false);
+            // We can only remove the script instances from the script engine after we've retrieved their xml state
+            // when we update the attachment item.
+            m_scene.DeleteSceneObject(so, false, false);
            // Prepare sog for storage
            so.AttachedAvatar = UUID.Zero;
@@ -811,6 +767,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
            so.AbsolutePosition = so.RootPart.AttachedPos;
            UpdateKnownItem(sp, so, true);
+            so.RemoveScriptInstances(true);
        }
        protected SceneObjectGroup RezSingleAttachmentFromInventoryInternal(
@@ -920,7 +877,13 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
            item = m_scene.InventoryService.GetItem(item);
            bool changed = sp.Appearance.SetAttachment((int)AttachmentPt, itemID, item.AssetID);
            if (changed && m_scene.AvatarFactory != null)
+            {
+//                m_log.DebugFormat(
+//                    "[ATTACHMENTS MODULE]: Queueing appearance save for {0}, attachment {1} point {2} in ShowAttachInUserInventory()",
+//                    sp.Name, att.Name, AttachmentPt);
                m_scene.AvatarFactory.QueueAppearanceSave(sp.UUID);
+            }
        }
        #endregion
diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
index 2eb0ac5..8423d43 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
@@ -118,7 +118,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
            Scene scene = CreateDefaultTestScene();
            UserAccount ua1 = UserAccountHelpers.CreateUserWithInventory(scene, 0x1);
-            ScenePresence sp = SceneHelpers.AddScenePresence(scene, ua1.PrincipalID);
+            ScenePresence sp = SceneHelpers.AddScenePresence(scene, ua1);
            string attName = "att";
@@ -149,9 +149,41 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
            InventoryFolderBase targetFolder = scene.InventoryService.GetFolderForType(sp.UUID, AssetType.Object);
            Assert.That(attachmentItem.Folder, Is.EqualTo(targetFolder.ID));
+            Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
 //            TestHelpers.DisableLogging();
        }
+        /// <summary>
+        /// Test that we do not attempt to attach an in-world object that someone else is sitting on.
+        /// </summary>
+        [Test]
+        public void TestAddSatOnAttachmentFromGround()
+        {
+            TestHelpers.InMethod();
+//            TestHelpers.EnableLogging();
+            Scene scene = CreateDefaultTestScene();
+            UserAccount ua1 = UserAccountHelpers.CreateUserWithInventory(scene, 0x1);
+            ScenePresence sp = SceneHelpers.AddScenePresence(scene, ua1);
+            string attName = "att";
+            SceneObjectGroup so = SceneHelpers.AddSceneObject(scene, attName, sp.UUID);
+            UserAccount ua2 = UserAccountHelpers.CreateUserWithInventory(scene, 0x2);
+            ScenePresence sp2 = SceneHelpers.AddScenePresence(scene, ua2);
+            // Put avatar within 10m of the prim so that sit doesn't fail.
+            sp2.AbsolutePosition = new Vector3(0, 0, 0);
+            sp2.HandleAgentRequestSit(sp2.ControllingClient, sp2.UUID, so.UUID, Vector3.Zero);
+            scene.AttachmentsModule.AttachObject(sp, so, (uint)AttachmentPoint.Chest, false, false);
+            Assert.That(sp.HasAttachments(), Is.False);
+            Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
+        }
        [Test]
        public void TestAddAttachmentFromInventory()
        {
@@ -181,6 +213,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
            // Check appearance status
            Assert.That(sp.Appearance.GetAttachments().Count, Is.EqualTo(1));
            Assert.That(sp.Appearance.GetAttachpoint(attItem.ID), Is.EqualTo((int)AttachmentPoint.Chest));
+            Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
        }
        [Test]
@@ -239,6 +273,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
            // Check item status
            Assert.That(sp.Appearance.GetAttachpoint(attItem.ID), Is.EqualTo(0));
+            Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(0));
        }
        /// <summary>
@@ -300,6 +336,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
            Assert.That(retreivedAttachments[0].ItemID, Is.EqualTo(attItem.ID));
            Assert.That(retreivedAttachments[0].AssetID, Is.EqualTo(attItem.AssetID));
            Assert.That(presence.Appearance.GetAttachpoint(attItem.ID), Is.EqualTo((int)AttachmentPoint.Chest));
+            Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
        }
        [Test]
@@ -399,6 +437,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
            Assert.That(actualSceneBAtt.Name, Is.EqualTo(attItem.Name));
            Assert.That(actualSceneBAtt.AttachmentPoint, Is.EqualTo((uint)AttachmentPoint.Chest));
+            Assert.That(sceneB.GetSceneObjectGroups().Count, Is.EqualTo(1));
            // Check attachments have been removed from sceneA
            ScenePresence afterTeleportSceneASp = sceneA.GetScenePresence(ua1.PrincipalID);
@@ -410,6 +450,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
            // This is the actual attachment, which should no longer exist
            List<SceneObjectGroup> actualSceneAAttachments = afterTeleportSceneASp.GetAttachments();
            Assert.That(actualSceneAAttachments.Count, Is.EqualTo(0));
+            Assert.That(sceneA.GetSceneObjectGroups().Count, Is.EqualTo(0));
        }
        // I'm commenting this test because scene setup NEEDS InventoryService to 
diff --git a/OpenSim/Region/CoreModules/Resources/CoreModulePlugin.addin.xml b/OpenSim/Region/CoreModules/Resources/CoreModulePlugin.addin.xml
index dc6efed..424e0ab 100644
--- a/OpenSim/Region/CoreModules/Resources/CoreModulePlugin.addin.xml
+++ b/OpenSim/Region/CoreModules/Resources/CoreModulePlugin.addin.xml
@@ -79,7 +79,6 @@
        <RegionModule id="AuthenticationServiceInConnectorModule" type="OpenSim.Region.CoreModules.ServiceConnectorsIn.Authentication.AuthenticationServiceInConnectorModule" />
        <RegionModule id="AccessModule" type="OpenSim.Region.CoreModules.World.AccessModule" />    \
        <RegionModule id="MapImageModule" type="OpenSim.Region.CoreModules.World.LegacyMap.MapImageModule" />    \
-        <RegionModule id="Warp3DImageModule" type="OpenSim.Region.CoreModules.World.Warp3DMap.Warp3DImageModule" />    \
    </Extension>
diff --git a/OpenSim/Region/CoreModules/World/WorldMap/WorldMapModule.cs b/OpenSim/Region/CoreModules/World/WorldMap/WorldMapModule.cs
index 724bb4c..00be5df 100644
--- a/OpenSim/Region/CoreModules/World/WorldMap/WorldMapModule.cs
+++ b/OpenSim/Region/CoreModules/World/WorldMap/WorldMapModule.cs
@@ -730,7 +730,7 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
                {
                    if (Environment.TickCount > (m_blacklistedregions[regionhandle] + blacklistTimeout))
                    {
-                        m_log.DebugFormat("[WORLDMAP]: Unblock blacklisted region {0}", regionhandle);
+                        m_log.DebugFormat("[WORLD MAP]: Unblock blacklisted region {0}", regionhandle);
                        m_blacklistedregions.Remove(regionhandle);
                    }
@@ -781,7 +781,7 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
                {
                    if (Environment.TickCount > (m_blacklistedurls[httpserver] + blacklistTimeout))
                    {
-                        m_log.DebugFormat("[WORLDMAP]: Unblock blacklisted URL {0}", httpserver);
+                        m_log.DebugFormat("[WORLD MAP]: Unblock blacklisted URL {0}", httpserver);
                        m_blacklistedurls.Remove(httpserver);
                    }
@@ -1343,7 +1343,7 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
            if (terrain == null)
                return;
-            m_log.DebugFormat("[WORLDMAP]: Generating map image for {0}", m_scene.RegionInfo.RegionName);
+            m_log.DebugFormat("[WORLD MAP]: Generating map image for {0}", m_scene.RegionInfo.RegionName);
            byte[] data = terrain.WriteJpeg2000Image();
            if (data == null)
@@ -1365,7 +1365,7 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
            asset.Flags = AssetFlags.Maptile;
            // Store the new one
-            m_log.DebugFormat("[WORLDMAP]: Storing map tile {0} for {1}", asset.ID, m_scene.RegionInfo.RegionName);
+            m_log.DebugFormat("[WORLD MAP]: Storing map tile {0} for {1}", asset.ID, m_scene.RegionInfo.RegionName);
            
            m_scene.AssetService.Store(asset);
diff --git a/OpenSim/Region/Framework/Interfaces/IEntityInventory.cs b/OpenSim/Region/Framework/Interfaces/IEntityInventory.cs
index 4f0e100..4274cbe 100644
--- a/OpenSim/Region/Framework/Interfaces/IEntityInventory.cs
+++ b/OpenSim/Region/Framework/Interfaces/IEntityInventory.cs
@@ -92,7 +92,7 @@ namespace OpenSim.Region.Framework.Interfaces
        void ResumeScripts();
        /// <summary>
-        /// Stop all the scripts in this entity.
+        /// Stop and remove all the scripts in this entity from the scene.
        /// </summary>
        /// <param name="sceneObjectBeingDeleted">
        /// Should be true if these scripts are being removed because the scene
@@ -101,6 +101,11 @@ namespace OpenSim.Region.Framework.Interfaces
        void RemoveScriptInstances(bool sceneObjectBeingDeleted);
        /// <summary>
+        /// Stop all the scripts in this entity.
+        /// </summary>
+        void StopScriptInstances();
+        /// <summary>
        /// Start a script which is in this entity's inventory.
        /// </summary>
        /// <param name="item"></param>
@@ -131,7 +136,7 @@ namespace OpenSim.Region.Framework.Interfaces
        ArrayList CreateScriptInstanceEr(UUID itemId, int startParam, bool postOnRez, string engine, int stateSource);
        /// <summary>
-        /// Stop a script which is in this prim's inventory.
+        /// Stop and remove a script which is in this prim's inventory from the scene.
        /// </summary>
        /// <param name="itemId"></param>
        /// <param name="sceneObjectBeingDeleted">
@@ -141,6 +146,12 @@ namespace OpenSim.Region.Framework.Interfaces
        void RemoveScriptInstance(UUID itemId, bool sceneObjectBeingDeleted);
        /// <summary>
+        /// Stop a script which is in this prim's inventory.
+        /// </summary>
+        /// <param name="itemId"></param>
+        void StopScriptInstance(UUID itemId);
+        /// <summary>
        /// Add an item to this entity's inventory.  If an item with the same name already exists, then an alternative
        /// name is chosen.
        /// </summary>
diff --git a/OpenSim/Region/Framework/Interfaces/INPCModule.cs b/OpenSim/Region/Framework/Interfaces/INPCModule.cs
index 860483d..d582149 100644
--- a/OpenSim/Region/Framework/Interfaces/INPCModule.cs
+++ b/OpenSim/Region/Framework/Interfaces/INPCModule.cs
@@ -184,6 +184,14 @@ namespace OpenSim.Region.Framework.Interfaces
        bool Stand(UUID agentID, Scene scene);
        /// <summary>
+        /// Get the NPC to touch an object.
+        /// </summary>
+        /// <param name="agentID"></param>
+        /// <param name="partID"></param>
+        /// <returns>true if the touch is actually attempted, false if not</returns>
+        bool Touch(UUID agentID, UUID partID);
+        /// <summary>
        /// Delete an NPC.
        /// </summary>
        /// <param name="agentID">The UUID of the NPC</param>
diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index a63ed13..eae8b8e 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -2281,13 +2281,30 @@ namespace OpenSim.Region.Framework.Scenes
        /// <summary>
        /// Synchronously delete the given object from the scene.
        /// </summary>
+        /// <remarks>
+        /// Scripts are also removed.
+        /// </remarks>
        /// <param name="group">Object Id</param>
        /// <param name="silent">Suppress broadcasting changes to other clients.</param>
        public void DeleteSceneObject(SceneObjectGroup group, bool silent)
+        {
+            DeleteSceneObject(group, silent, true);
+        }
+        /// <summary>
+        /// Synchronously delete the given object from the scene.
+        /// </summary>
+        /// <param name="group">Object Id</param>
+        /// <param name="silent">Suppress broadcasting changes to other clients.</param>
+        /// <param name="removeScripts">If true, then scripts are removed.  If false, then they are only stopped.</para>
+        public void DeleteSceneObject(SceneObjectGroup group, bool silent, bool removeScripts)
        {            
 //            m_log.DebugFormat("[SCENE]: Deleting scene object {0} {1}", group.Name, group.UUID);
-            group.RemoveScriptInstances(true);
+            if (removeScripts)
+                group.RemoveScriptInstances(true);
+            else
+                group.StopScriptInstances();
            SceneObjectPart[] partList = group.Parts;
@@ -2595,7 +2612,16 @@ namespace OpenSim.Region.Framework.Scenes
            }
            catch (Exception e)
            {
-                m_log.WarnFormat("[SCENE]: Problem casting object, exception {0}{1}", e.Message, e.StackTrace);
+                m_log.WarnFormat("[INTERREGION]: Problem casting object, exception {0}{1}", e.Message, e.StackTrace);
+                return false;
+            }
+            // If the user is banned, we won't let any of their objects
+            // enter. Period.
+            //
+            if (RegionInfo.EstateSettings.IsBanned(newObject.OwnerID, 36))
+            {
+                m_log.InfoFormat("[INTERREGION]: Denied prim crossing for banned avatar {0}", newObject.OwnerID);
                return false;
            }
@@ -2606,14 +2632,28 @@ namespace OpenSim.Region.Framework.Scenes
            if (!AddSceneObject(newObject))
            {
-                m_log.DebugFormat("[SCENE]: Problem adding scene object {0} in {1} ", sog.UUID, RegionInfo.RegionName);
+                m_log.DebugFormat(
+                    "[INTERREGION]: Problem adding scene object {0} in {1} ", newObject.UUID, RegionInfo.RegionName);
                return false;
            }
-            // For attachments, we need to wait until the agent is root
-            // before we restart the scripts, or else some functions won't work.
            if (!newObject.IsAttachment)
            {
+                // FIXME: It would be better to never add the scene object at all rather than add it and then delete
+                // it
+                if (!Permissions.CanObjectEntry(newObject.UUID, true, newObject.AbsolutePosition))
+                {
+                    // Deny non attachments based on parcel settings
+                    //
+                    m_log.Info("[INTERREGION]: Denied prim crossing because of parcel settings");
+                    DeleteSceneObject(newObject, false);
+                    return false;
+                }
+                // For attachments, we need to wait until the agent is root
+                // before we restart the scripts, or else some functions won't work.
                newObject.RootPart.ParentGroup.CreateScriptInstances(0, false, DefaultScriptEngine, GetStateSource(newObject));
                newObject.ResumeScripts();
            }
@@ -2650,8 +2690,6 @@ namespace OpenSim.Region.Framework.Scenes
                return false;
            }
-            sceneObject.SetScene(this);
            // Force allocation of new LocalId
            //
            SceneObjectPart[] parts = sceneObject.Parts;
@@ -2707,18 +2745,6 @@ namespace OpenSim.Region.Framework.Scenes
                    return false;
                }
                AddRestoredSceneObject(sceneObject, true, false);
-                if (!Permissions.CanObjectEntry(sceneObject.UUID,
-                        true, sceneObject.AbsolutePosition))
-                {
-                    // Deny non attachments based on parcel settings
-                    //
-                    m_log.Info("[INTERREGION]: Denied prim crossing because of parcel settings");
-                    DeleteSceneObject(sceneObject, false);
-                    return false;
-                }
            }
            return true;
@@ -4654,6 +4680,17 @@ namespace OpenSim.Region.Framework.Scenes
        }
        /// <summary>
+        /// Get all the scene object groups.
+        /// </summary>
+        /// <returns>
+        /// The scene object groups.  If the scene is empty then an empty list is returned.
+        /// </returns>
+        public List<SceneObjectGroup> GetSceneObjectGroups()
+        {
+            return m_sceneGraph.GetSceneObjectGroups();
+        }
+        /// <summary>
        /// Get a group via its UUID
        /// </summary>
        /// <param name="fullID"></param>
diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index 3390aba..b23d2e5 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -401,9 +401,9 @@ namespace OpenSim.Region.Framework.Scenes
            if (Entities.ContainsKey(sceneObject.UUID))
            {
-//                m_log.DebugFormat(
+                m_log.DebugFormat(
-//                    "[SCENEGRAPH]: Scene graph for {0} already contains object {1} in AddSceneObject()",
+                    "[SCENEGRAPH]: Scene graph for {0} already contains object {1} in AddSceneObject()",
-//                    m_parentScene.RegionInfo.RegionName, sceneObject.UUID);
+                    m_parentScene.RegionInfo.RegionName, sceneObject.UUID);
                return false;
            }
@@ -1038,6 +1038,18 @@ namespace OpenSim.Region.Framework.Scenes
        }
        /// <summary>
+        /// Get all the scene object groups.
+        /// </summary>
+        /// <returns>
+        /// The scene object groups.  If the scene is empty then an empty list is returned.
+        /// </returns>
+        protected internal List<SceneObjectGroup> GetSceneObjectGroups()
+        {
+            lock (SceneObjectGroupsByFullID)
+                return new List<SceneObjectGroup>(SceneObjectGroupsByFullID.Values);
+        }
+        /// <summary>
        /// Get a group in the scene
        /// </summary>
        /// <param name="fullID">UUID of the group</param>
@@ -1180,11 +1192,7 @@ namespace OpenSim.Region.Framework.Scenes
        /// <param name="action"></param>
        protected internal void ForEachSOG(Action<SceneObjectGroup> action)
        {
-            List<SceneObjectGroup> objlist;
+            foreach (SceneObjectGroup obj in GetSceneObjectGroups())
-            lock (SceneObjectGroupsByFullID)
-                objlist = new List<SceneObjectGroup>(SceneObjectGroupsByFullID.Values);
-            foreach (SceneObjectGroup obj in objlist)
            {
                try
                {
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.Inventory.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.Inventory.cs
index 1038111..26524fb 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.Inventory.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.Inventory.cs
@@ -79,7 +79,7 @@ namespace OpenSim.Region.Framework.Scenes
        }
        /// <summary>
-        /// Stop the scripts contained in all the prims in this group
+        /// Stop and remove the scripts contained in all the prims in this group
        /// </summary>
        public void RemoveScriptInstances(bool sceneObjectBeingDeleted)
        {
@@ -89,6 +89,14 @@ namespace OpenSim.Region.Framework.Scenes
        }
        /// <summary>
+        /// Stop the scripts contained in all the prims in this group
+        /// </summary>
+        public void StopScriptInstances()
+        {
+            Array.ForEach<SceneObjectPart>(m_parts.GetArray(), p => p.Inventory.StopScriptInstances());
+        }
+        /// <summary>
        /// Add an inventory item from a user's inventory to a prim in this scene object.
        /// </summary>
        /// <param name="agentID">The agent adding the item.</param>
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index f68a5b3..cc7d0fb 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -1674,16 +1674,6 @@ namespace OpenSim.Region.Framework.Scenes
        {
            return Utils.FloatToUInt16(m_scene.TimeDilation, 0.0f, 1.0f);
        }
-        /// <summary>
-        /// Added as a way for the storage provider to reset the scene,
-        /// most likely a better way to do this sort of thing but for now...
-        /// </summary>
-        /// <param name="scene"></param>
-        public void SetScene(Scene scene)
-        {
-            m_scene = scene;
-        }
        
        /// <summary>
        /// Set a part to act as the root part for this scene object
@@ -4324,6 +4314,20 @@ namespace OpenSim.Region.Framework.Scenes
            return count;
        }
+        /// <summary>
+        /// Gets the number of sitting avatars.
+        /// </summary>
+        /// <remarks>This applies to all sitting avatars whether there is a sit target set or not.</remarks>
+        /// <returns></returns>
+        public int GetSittingAvatarsCount()
+        {
+             int count = 0;
+             Array.ForEach<SceneObjectPart>(m_parts.GetArray(), p => count += p.GetSittingAvatarsCount());
+             return count;
+        }
        public override string ToString()
        {
            return String.Format("{0} {1} ({2})", Name, UUID, AbsolutePosition);
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index 7b1f5d2..1f1caca 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -147,6 +147,21 @@ namespace OpenSim.Region.Framework.Scenes
            get { return ParentGroup.RootPart == this; } 
        }
+        /// <summary>
+        /// Is an explicit sit target set for this part?
+        /// </summary>
+        public bool IsSitTargetSet
+        {
+            get
+            {
+                return
+                    !(SitTargetPosition == Vector3.Zero
+                      && (SitTargetOrientation == Quaternion.Identity // Valid Zero Rotation quaternion
+                       || SitTargetOrientation.X == 0f && SitTargetOrientation.Y == 0f && SitTargetOrientation.Z == 1f && SitTargetOrientation.W == 0f // W-Z Mapping was invalid at one point
+                       || SitTargetOrientation.X == 0f && SitTargetOrientation.Y == 0f && SitTargetOrientation.Z == 0f && SitTargetOrientation.W == 0f)); // Invalid Quaternion
+            }
+        }
        #region Fields
        public bool AllowedDrop;
@@ -426,7 +441,6 @@ namespace OpenSim.Region.Framework.Scenes
        private uint _category;
        private Int32 _creationDate;
        private uint _parentID = 0;
-        private UUID m_sitTargetAvatar = UUID.Zero;
        private uint _baseMask = (uint)PermissionMask.All;
        private uint _ownerMask = (uint)PermissionMask.All;
        private uint _groupMask = (uint)PermissionMask.None;
@@ -1312,13 +1326,20 @@ namespace OpenSim.Region.Framework.Scenes
        }
        /// <summary>
-        /// ID of the avatar that is sat on us.  If there is no such avatar then is UUID.Zero
+        /// ID of the avatar that is sat on us if we have a sit target.  If there is no such avatar then is UUID.Zero
        /// </summary>
-        public UUID SitTargetAvatar
+        public UUID SitTargetAvatar { get; set; }
-        {
-            get { return m_sitTargetAvatar; }
+        /// <summary>
-            set { m_sitTargetAvatar = value; }
+        /// IDs of all avatars start on this object part.
-        }
+        /// </summary>
+        /// <remarks>
+        /// We need to track this so that we can stop sat upon prims from being attached.
+        /// </remarks>
+        /// <value>
+        /// null if there are no sitting avatars.  This is to save us create a hashset for every prim in a scene.
+        /// </value>
+        private HashSet<UUID> m_sittingAvatars;
        public virtual UUID RegionID
        {
@@ -5128,5 +5149,99 @@ namespace OpenSim.Region.Framework.Scenes
                Inventory.UpdateInventoryItem(item, false, false);
            }
        }
+        /// <summary>
+        /// Record an avatar sitting on this part.
+        /// </summary>
+        /// <remarks>This is called for all the sitting avatars whether there is a sit target set or not.</remarks>
+        /// <returns>
+        /// true if the avatar was not already recorded, false otherwise.
+        /// </returns>
+        /// <param name='avatarId'></param>
+        protected internal bool AddSittingAvatar(UUID avatarId)
+        {
+            if (IsSitTargetSet && SitTargetAvatar == UUID.Zero)
+                SitTargetAvatar = avatarId;
+            HashSet<UUID> sittingAvatars = m_sittingAvatars;
+            if (sittingAvatars == null)
+                sittingAvatars = new HashSet<UUID>();
+            lock (sittingAvatars)
+            {
+                m_sittingAvatars = sittingAvatars;
+                return m_sittingAvatars.Add(avatarId);
+            }
+        }
+        /// <summary>
+        /// Remove an avatar recorded as sitting on this part.
+        /// </summary>
+        /// <remarks>This applies to all sitting avatars whether there is a sit target set or not.</remarks>
+        /// <returns>
+        /// true if the avatar was present and removed, false if it was not present.
+        /// </returns>
+        /// <param name='avatarId'></param>
+        protected internal bool RemoveSittingAvatar(UUID avatarId)
+        {
+            if (SitTargetAvatar == avatarId)
+                SitTargetAvatar = UUID.Zero;
+            HashSet<UUID> sittingAvatars = m_sittingAvatars;
+            // This can occur under a race condition where another thread
+            if (sittingAvatars == null)
+                return false;
+            lock (sittingAvatars)
+            {
+                if (sittingAvatars.Remove(avatarId))
+                {
+                    if (sittingAvatars.Count == 0)
+                        m_sittingAvatars = null;
+                    return true;
+                }
+            }
+            return false;
+        }
+        /// <summary>
+        /// Get a copy of the list of sitting avatars.
+        /// </summary>
+        /// <remarks>This applies to all sitting avatars whether there is a sit target set or not.</remarks>
+        /// <returns>A hashset of the sitting avatars.  Returns null if there are no sitting avatars.</returns>
+        public HashSet<UUID> GetSittingAvatars()
+        {
+            HashSet<UUID> sittingAvatars = m_sittingAvatars;
+            if (sittingAvatars == null)
+            {
+                return null;
+            }
+            else
+            {
+                lock (sittingAvatars)
+                    return new HashSet<UUID>(sittingAvatars);
+            }
+        }
+        /// <summary>
+        /// Gets the number of sitting avatars.
+        /// </summary>
+        /// <remarks>This applies to all sitting avatars whether there is a sit target set or not.</remarks>
+        /// <returns></returns>
+        public int GetSittingAvatarsCount()
+        {
+            HashSet<UUID> sittingAvatars = m_sittingAvatars;
+            if (sittingAvatars == null)
+                return 0;
+            lock (sittingAvatars)
+                return sittingAvatars.Count;
+        }
    }
 }
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs
index 1dff088..e5e29d0 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs
@@ -292,7 +292,7 @@ namespace OpenSim.Region.Framework.Scenes
        }
        /// <summary>
-        /// Stop all the scripts in this prim.
+        /// Stop and remove all the scripts in this prim.
        /// </summary>
        /// <param name="sceneObjectBeingDeleted">
        /// Should be true if these scripts are being removed because the scene
@@ -309,6 +309,14 @@ namespace OpenSim.Region.Framework.Scenes
        }
        /// <summary>
+        /// Stop all the scripts in this prim.
+        /// </summary>
+        public void StopScriptInstances()
+        {
+            GetInventoryItems(InventoryType.LSL).ForEach(i => StopScriptInstance(i));
+        }
+        /// <summary>
        /// Start a script which is in this prim's inventory.
        /// </summary>
        /// <param name="item"></param>
@@ -596,7 +604,7 @@ namespace OpenSim.Region.Framework.Scenes
        }
        /// <summary>
-        /// Stop a script which is in this prim's inventory.
+        /// Stop and remove a script which is in this prim's inventory.
        /// </summary>
        /// <param name="itemId"></param>
        /// <param name="sceneObjectBeingDeleted">
@@ -615,7 +623,7 @@ namespace OpenSim.Region.Framework.Scenes
            }
            else
            {
-                m_log.ErrorFormat(
+                m_log.WarnFormat(
                    "[PRIM INVENTORY]: " +
                    "Couldn't stop script with ID {0} since it couldn't be found for prim {1}, {2} at {3} in {4}",
                    itemId, m_part.Name, m_part.UUID, 
@@ -624,6 +632,51 @@ namespace OpenSim.Region.Framework.Scenes
        }
        /// <summary>
+        /// Stop a script which is in this prim's inventory.
+        /// </summary>
+        /// <param name="itemId"></param>
+        /// <param name="sceneObjectBeingDeleted">
+        /// Should be true if this script is being removed because the scene
+        /// object is being deleted.  This will prevent spurious updates to the client.
+        /// </param>
+        public void StopScriptInstance(UUID itemId)
+        {
+            TaskInventoryItem scriptItem;
+            lock (m_items)
+                m_items.TryGetValue(itemId, out scriptItem);
+            if (scriptItem != null)
+            {
+                StopScriptInstance(scriptItem);
+            }
+            else
+            {
+                m_log.WarnFormat(
+                    "[PRIM INVENTORY]: " +
+                    "Couldn't stop script with ID {0} since it couldn't be found for prim {1}, {2} at {3} in {4}",
+                    itemId, m_part.Name, m_part.UUID, 
+                    m_part.AbsolutePosition, m_part.ParentGroup.Scene.RegionInfo.RegionName);
+            }
+        }
+        /// <summary>
+        /// Stop a script which is in this prim's inventory.
+        /// </summary>
+        /// <param name="itemId"></param>
+        /// <param name="sceneObjectBeingDeleted">
+        /// Should be true if this script is being removed because the scene
+        /// object is being deleted.  This will prevent spurious updates to the client.
+        /// </param>
+        public void StopScriptInstance(TaskInventoryItem item)
+        {
+            m_part.ParentGroup.Scene.EventManager.TriggerStopScript(m_part.LocalId, item.ItemID);
+            // At the moment, even stopped scripts are counted as active, which is probably wrong.
+//            m_part.ParentGroup.AddActiveScriptCount(-1);
+        }
+        /// <summary>
        /// Check if the inventory holds an item with a given name.
        /// </summary>
        /// <param name="name"></param>
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index f0ceff6..e27d309 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -594,6 +594,12 @@ namespace OpenSim.Region.Framework.Scenes
        private UUID m_parentUUID = UUID.Zero;
        /// <summary>
+        /// Are we sitting on an object?
+        /// </summary>
+        /// <remarks>A more readable way of testing presence sit status than ParentID == 0</remarks>
+        public bool IsSatOnObject { get { return ParentID != 0; } }
+        /// <summary>
        /// If the avatar is sitting, the prim that it's sitting on.  If not sitting then null.
        /// </summary>
        /// <remarks>
@@ -1940,10 +1946,6 @@ namespace OpenSim.Region.Framework.Scenes
                    }
                }
-                // Reset sit target.
-                if (part.SitTargetAvatar == UUID)
-                    part.SitTargetAvatar = UUID.Zero;
                part.ParentGroup.DeleteAvatar(UUID);
 //                ParentPosition = part.GetWorldPosition();
                ControllingClient.SendClearFollowCamProperties(part.ParentUUID);
@@ -1961,6 +1963,8 @@ namespace OpenSim.Region.Framework.Scenes
                SendAvatarDataToAllAgents();
                m_requestedSitTargetID = 0;
+                part.RemoveSittingAvatar(UUID);
                if (part != null)
                    part.ParentGroup.TriggerScriptChangedEvent(Changed.LINK);
            }
@@ -1994,15 +1998,7 @@ namespace OpenSim.Region.Framework.Scenes
            //look for prims with explicit sit targets that are available
            foreach (SceneObjectPart part in partArray)
            {
-                // Is a sit target available?
+                if (part.IsSitTargetSet && part.SitTargetAvatar == UUID.Zero)
-                Vector3 avSitOffset = part.SitTargetPosition;
-                Quaternion avSitOrientation = part.SitTargetOrientation;
-                UUID avOnTargetAlready = part.SitTargetAvatar;
-                bool SitTargetUnOccupied = avOnTargetAlready == UUID.Zero;
-                bool SitTargetisSet = avSitOffset != Vector3.Zero || avSitOrientation != Quaternion.Identity;
-                if (SitTargetisSet && SitTargetUnOccupied)
                {
                    //switch the target to this prim
                    return part;
@@ -2013,10 +2009,8 @@ namespace OpenSim.Region.Framework.Scenes
            return targetPart;
        }
-        private void SendSitResponse(UUID targetID, Vector3 offset, Quaternion pSitOrientation)
+        private void SendSitResponse(UUID targetID, Vector3 offset, Quaternion sitOrientation)
        {
-            Vector3 pos = new Vector3();
-            Quaternion sitOrientation = pSitOrientation;
            Vector3 cameraEyeOffset = Vector3.Zero;
            Vector3 cameraAtOffset = Vector3.Zero;
            bool forceMouselook = false;
@@ -2028,42 +2022,21 @@ namespace OpenSim.Region.Framework.Scenes
            // TODO: determine position to sit at based on scene geometry; don't trust offset from client
            // see http://wiki.secondlife.com/wiki/User:Andrew_Linden/Office_Hours/2007_11_06 for details on how LL does it
-            // Is a sit target available?
-            Vector3 avSitOffSet = part.SitTargetPosition;
-            Quaternion avSitOrientation = part.SitTargetOrientation;
-            UUID avOnTargetAlready = part.SitTargetAvatar;
-            bool SitTargetUnOccupied = (!(avOnTargetAlready != UUID.Zero));
-            bool SitTargetisSet =
-                (!(avSitOffSet == Vector3.Zero &&
-                   (
-                       avSitOrientation == Quaternion.Identity // Valid Zero Rotation quaternion
-                       || avSitOrientation.X == 0f && avSitOrientation.Y == 0f && avSitOrientation.Z == 1f && avSitOrientation.W == 0f // W-Z Mapping was invalid at one point
-                       || avSitOrientation.X == 0f && avSitOrientation.Y == 0f && avSitOrientation.Z == 0f && avSitOrientation.W == 0f // Invalid Quaternion
-                   )
-                   ));
-//                m_log.DebugFormat("[SCENE PRESENCE]: {0} {1}", SitTargetisSet, SitTargetUnOccupied);
            if (PhysicsActor != null)
                m_sitAvatarHeight = PhysicsActor.Size.Z * 0.5f;
            bool canSit = false;
-            pos = part.AbsolutePosition + offset;
+            Vector3 pos = part.AbsolutePosition + offset;
-            if (SitTargetisSet)
+            if (part.IsSitTargetSet && part.SitTargetAvatar == UUID.Zero)
            {
-                if (SitTargetUnOccupied)
-                {
 //                    m_log.DebugFormat(
 //                        "[SCENE PRESENCE]: Sitting {0} on {1} {2} because sit target is set and unoccupied",
 //                        Name, part.Name, part.LocalId);
-                    part.SitTargetAvatar = UUID;
+                offset = part.SitTargetPosition;
-                    offset = new Vector3(avSitOffSet.X, avSitOffSet.Y, avSitOffSet.Z);
+                sitOrientation = part.SitTargetOrientation;
-                    sitOrientation = avSitOrientation;
+                canSit = true;
-                    canSit = true;
-                }
            }
            else
            {
@@ -2076,6 +2049,12 @@ namespace OpenSim.Region.Framework.Scenes
                    AbsolutePosition = pos + new Vector3(0.0f, 0.0f, m_sitAvatarHeight);
                    canSit = true;
                }
+//                else
+//                {
+//                    m_log.DebugFormat(
+//                        "[SCENE PRESENCE]: Ignoring sit request of {0} on {1} {2} because sit target is unset and outside 10m",
+//                        Name, part.Name, part.LocalId);
+//                }
            }
            if (canSit)
@@ -2086,6 +2065,8 @@ namespace OpenSim.Region.Framework.Scenes
                    RemoveFromPhysicalScene();
                }
+                part.AddSittingAvatar(UUID);
                cameraAtOffset = part.GetCameraAtOffset();
                cameraEyeOffset = part.GetCameraEyeOffset();
                forceMouselook = part.GetForceMouselook();
@@ -2362,6 +2343,15 @@ namespace OpenSim.Region.Framework.Scenes
            if (part != null)
            {
+                if (part.ParentGroup.IsAttachment)
+                {
+                    m_log.WarnFormat(
+                        "[SCENE PRESENCE]: Avatar {0} tried to sit on part {1} from object {2} in {3} but this is an attachment for avatar id {4}",
+                        Name, part.Name, part.ParentGroup.Name, Scene.Name, part.ParentGroup.AttachedAvatar);
+                    return;
+                }
                if (part.SitTargetAvatar == UUID)
                {
                    Vector3 sitTargetPos = part.SitTargetPosition;
diff --git a/OpenSim/Region/Framework/Scenes/Tests/ScenePresenceSitTests.cs b/OpenSim/Region/Framework/Scenes/Tests/ScenePresenceSitTests.cs
index ed39be1..493ab70 100644
--- a/OpenSim/Region/Framework/Scenes/Tests/ScenePresenceSitTests.cs
+++ b/OpenSim/Region/Framework/Scenes/Tests/ScenePresenceSitTests.cs
@@ -26,6 +26,7 @@
 */
 using System;
+using System.Collections.Generic;
 using System.Reflection;
 using Nini.Config;
 using NUnit.Framework;
@@ -69,6 +70,8 @@ namespace OpenSim.Region.Framework.Scenes.Tests
            m_sp.HandleAgentRequestSit(m_sp.ControllingClient, m_sp.UUID, part.UUID, Vector3.Zero);
            Assert.That(part.SitTargetAvatar, Is.EqualTo(UUID.Zero));
+            Assert.That(part.GetSittingAvatarsCount(), Is.EqualTo(0));
+            Assert.That(part.GetSittingAvatars(), Is.Null);
            Assert.That(m_sp.ParentID, Is.EqualTo(0));
        }
@@ -86,7 +89,13 @@ namespace OpenSim.Region.Framework.Scenes.Tests
            m_sp.HandleAgentRequestSit(m_sp.ControllingClient, m_sp.UUID, part.UUID, Vector3.Zero);
+            Assert.That(m_sp.PhysicsActor, Is.Null);
            Assert.That(part.SitTargetAvatar, Is.EqualTo(UUID.Zero));
+            Assert.That(part.GetSittingAvatarsCount(), Is.EqualTo(1));
+            HashSet<UUID> sittingAvatars = part.GetSittingAvatars();
+            Assert.That(sittingAvatars.Count, Is.EqualTo(1));
+            Assert.That(sittingAvatars.Contains(m_sp.UUID));
            Assert.That(m_sp.ParentID, Is.EqualTo(part.LocalId));
        }
@@ -104,10 +113,6 @@ namespace OpenSim.Region.Framework.Scenes.Tests
            m_sp.HandleAgentRequestSit(m_sp.ControllingClient, m_sp.UUID, part.UUID, Vector3.Zero);
-            Assert.That(part.SitTargetAvatar, Is.EqualTo(UUID.Zero));
-            Assert.That(m_sp.ParentID, Is.EqualTo(part.LocalId));
-            Assert.That(m_sp.PhysicsActor, Is.Null);
            // FIXME: This is different for live avatars - z position is adjusted.  This is half the height of the
            // default avatar.
            // Curiously, Vector3.ToString() will not display the last two places of the float.  For example,
@@ -119,6 +124,8 @@ namespace OpenSim.Region.Framework.Scenes.Tests
            m_sp.StandUp();
            Assert.That(part.SitTargetAvatar, Is.EqualTo(UUID.Zero));
+            Assert.That(part.GetSittingAvatarsCount(), Is.EqualTo(0));
+            Assert.That(part.GetSittingAvatars(), Is.Null);
            Assert.That(m_sp.ParentID, Is.EqualTo(0));
            Assert.That(m_sp.PhysicsActor, Is.Not.Null);
        }
@@ -145,11 +152,20 @@ namespace OpenSim.Region.Framework.Scenes.Tests
                Is.EqualTo(part.AbsolutePosition + part.SitTargetPosition + ScenePresence.SIT_TARGET_ADJUSTMENT));
            Assert.That(m_sp.PhysicsActor, Is.Null);
+            Assert.That(part.GetSittingAvatarsCount(), Is.EqualTo(1));
+            HashSet<UUID> sittingAvatars = part.GetSittingAvatars();
+            Assert.That(sittingAvatars.Count, Is.EqualTo(1));
+            Assert.That(sittingAvatars.Contains(m_sp.UUID));
            m_sp.StandUp();
            Assert.That(part.SitTargetAvatar, Is.EqualTo(UUID.Zero));
            Assert.That(m_sp.ParentID, Is.EqualTo(0));
            Assert.That(m_sp.PhysicsActor, Is.Not.Null);
+            Assert.That(part.SitTargetAvatar, Is.EqualTo(UUID.Zero));
+            Assert.That(part.GetSittingAvatarsCount(), Is.EqualTo(0));
+            Assert.That(part.GetSittingAvatars(), Is.Null);
        }
        [Test]
diff --git a/OpenSim/Region/OptionalModules/Scripting/RegionReadyModule/RegionReadyModule.cs b/OpenSim/Region/OptionalModules/Scripting/RegionReadyModule/RegionReadyModule.cs
index 0b9f875..600cafb 100644
--- a/OpenSim/Region/OptionalModules/Scripting/RegionReadyModule/RegionReadyModule.cs
+++ b/OpenSim/Region/OptionalModules/Scripting/RegionReadyModule/RegionReadyModule.cs
@@ -228,9 +228,10 @@ namespace OpenSim.Region.OptionalModules.Scripting.RegionReady
                    // m_log.InfoFormat("[RegionReady]: Logins enabled for {0}, Oar {1}",
                    //                 m_scene.RegionInfo.RegionName, m_oarFileLoading.ToString());
-                    m_log.InfoFormat("[RegionReady]: Initialization complete - logins enabled for {0}", m_scene.RegionInfo.RegionName);
+                    m_log.InfoFormat(
+                        "[RegionReady]: INITIALIZATION COMPLETE FOR {0} - LOGINS ENABLED", m_scene.Name);
-                    if ( m_uri != string.Empty )
+                    if (m_uri != string.Empty)
                    {
                        RRAlert("enabled");
                    }
diff --git a/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs b/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs
index 4fcf40d..045661a 100644
--- a/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs
+++ b/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs
@@ -104,6 +104,45 @@ namespace OpenSim.Region.OptionalModules.World.NPC
            OnMoneyTransferRequest(m_uuid, target, amount, 1, "Payment");
        }
+        public bool Touch(UUID target)
+        {
+            SceneObjectPart part = m_scene.GetSceneObjectPart(target);
+            if (part == null)
+                return false;
+            bool objectTouchable = hasTouchEvents(part); // Only touch an object that is scripted to respond
+            if (!objectTouchable && !part.IsRoot)
+                objectTouchable = hasTouchEvents(part.ParentGroup.RootPart);
+            if (!objectTouchable)
+                return false;
+            // Set up the surface args as if the touch is from a client that does not support this
+            SurfaceTouchEventArgs surfaceArgs = new SurfaceTouchEventArgs();
+            surfaceArgs.FaceIndex = -1; // TOUCH_INVALID_FACE
+            surfaceArgs.Binormal =  Vector3.Zero; // TOUCH_INVALID_VECTOR
+            surfaceArgs.Normal =  Vector3.Zero; // TOUCH_INVALID_VECTOR
+            surfaceArgs.STCoord = new Vector3(-1.0f, -1.0f, 0.0f); // TOUCH_INVALID_TEXCOORD
+            surfaceArgs.UVCoord = surfaceArgs.STCoord; // TOUCH_INVALID_TEXCOORD
+            List<SurfaceTouchEventArgs> touchArgs = new List<SurfaceTouchEventArgs>();
+            touchArgs.Add(surfaceArgs);
+            Vector3 offset = part.OffsetPosition * -1.0f;
+            if (OnGrabObject == null)
+                return false;
+            OnGrabObject(part.LocalId, offset, this, touchArgs);
+            if (OnGrabUpdate != null)
+                OnGrabUpdate(part.UUID, offset, part.ParentGroup.RootPart.GroupPosition, this, touchArgs);
+            if (OnDeGrabObject != null)
+                OnDeGrabObject(part.LocalId, this, touchArgs);
+            return true;
+        }
+        private bool hasTouchEvents(SceneObjectPart part)
+        {
+            if ((part.ScriptEvents & scriptEvents.touch) != 0 ||
+                (part.ScriptEvents & scriptEvents.touch_start) != 0 ||
+                (part.ScriptEvents & scriptEvents.touch_end) != 0)
+                return true;
+            return false;
+        }
        public void InstantMessage(UUID target, string message)
        {
            OnInstantMessage(this, new GridInstantMessage(m_scene,
@@ -153,6 +192,14 @@ namespace OpenSim.Region.OptionalModules.World.NPC
        private void SendOnChatFromClient(int channel, string message, ChatTypeEnum chatType)
        {
+            if (channel == 0)
+            {
+                message = message.Trim();
+                if (string.IsNullOrEmpty(message))
+                {
+                    return;
+                }
+            }
            OSChatMessage chatFromClient = new OSChatMessage();
            chatFromClient.Channel = channel;
            chatFromClient.From = Name;
diff --git a/OpenSim/Region/OptionalModules/World/NPC/NPCModule.cs b/OpenSim/Region/OptionalModules/World/NPC/NPCModule.cs
index a32ab2a..b37aba3 100644
--- a/OpenSim/Region/OptionalModules/World/NPC/NPCModule.cs
+++ b/OpenSim/Region/OptionalModules/World/NPC/NPCModule.cs
@@ -306,6 +306,16 @@ namespace OpenSim.Region.OptionalModules.World.NPC
            return false;
        }
+        public bool Touch(UUID agentID, UUID objectID)
+        {
+            lock (m_avatars)
+            {
+                if (m_avatars.ContainsKey(agentID))
+                    return m_avatars[agentID].Touch(objectID);
+                return false;
+            }
+        }
        public UUID GetOwner(UUID agentID)
        {
            lock (m_avatars)
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs b/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
index b08d5db..dc0c008 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
@@ -74,7 +74,7 @@ public class BSCharacter : PhysicsActor
    private float _buoyancy;
    private int _subscribedEventsMs = 0;
-    private int _lastCollisionTime = 0;
+    private int _nextCollisionOkTime = 0;
    private Vector3 _PIDTarget;
    private bool _usePID;
@@ -360,17 +360,22 @@ public class BSCharacter : PhysicsActor
        }
        //m_lastUpdateSent = false;
    }
    public override void AddAngularForce(Vector3 force, bool pushforce) { 
    }
    public override void SetMomentum(Vector3 momentum) { 
    }
+    // Turn on collision events at a rate no faster than one every the given milliseconds
    public override void SubscribeEvents(int ms) {
        _subscribedEventsMs = ms;
-        _lastCollisionTime = Util.EnvironmentTickCount() - _subscribedEventsMs; // make first collision happen
+        _nextCollisionOkTime = Util.EnvironmentTickCount() - _subscribedEventsMs; // make first collision happen
    }
+    // Stop collision events
    public override void UnSubscribeEvents() { 
        _subscribedEventsMs = 0;
    }
+    // Return 'true' if someone has subscribed to events
    public override bool SubscribedEvents() {
        return (_subscribedEventsMs > 0);
    }
@@ -386,47 +391,57 @@ public class BSCharacter : PhysicsActor
        _mass = _density * _avatarVolume;
    }
+    // Set to 'true' if the individual changed items should be checked
+    //   (someday RequestPhysicsTerseUpdate() will take a bitmap of changed properties)
+    const bool SHOULD_CHECK_FOR_INDIVIDUAL_CHANGES = false;
    // The physics engine says that properties have updated. Update same and inform
    // the world that things have changed.
    public void UpdateProperties(EntityProperties entprop)
    {
        bool changed = false;
-        // we assign to the local variables so the normal set action does not happen
+        if (SHOULD_CHECK_FOR_INDIVIDUAL_CHANGES) {
-        if (_position != entprop.Position)
+            // we assign to the local variables so the normal set action does not happen
-        {
+            if (_position != entprop.Position) {
-            _position = entprop.Position;
+                _position = entprop.Position;
-            changed = true;
+                changed = true;
+            }
+            if (_orientation != entprop.Rotation) {
+                _orientation = entprop.Rotation;
+                changed = true;
+            }
+            if (_velocity != entprop.Velocity) {
+                _velocity = entprop.Velocity;
+                changed = true;
+            }
+            if (_acceleration != entprop.Acceleration) {
+                _acceleration = entprop.Acceleration;
+                changed = true;
+            }
+            if (_rotationalVelocity != entprop.RotationalVelocity) {
+                _rotationalVelocity = entprop.RotationalVelocity;
+                changed = true;
+            }
+            if (changed) {
+                // m_log.DebugFormat("{0}: UpdateProperties: id={1}, c={2}, pos={3}, rot={4}", LogHeader, LocalID, changed, _position, _orientation);
+                // Avatar movement is not done by generating this event. There is code in the heartbeat
+                //   loop that updates avatars.
+                // base.RequestPhysicsterseUpdate();
+            }
        }
-        if (_orientation != entprop.Rotation)
+        else {
-        {
+            _position = entprop.Position;
            _orientation = entprop.Rotation;
-            changed = true;
-        }
-        if (_velocity != entprop.Velocity)
-        {
            _velocity = entprop.Velocity;
-            changed = true;
-        }
-        if (_acceleration != entprop.Acceleration)
-        {
            _acceleration = entprop.Acceleration;
-            changed = true;
-        }
-        if (_rotationalVelocity != entprop.RotationalVelocity)
-        {
            _rotationalVelocity = entprop.RotationalVelocity;
-            changed = true;
-        }
-        if (changed)
-        {
-            // m_log.DebugFormat("{0}: UpdateProperties: id={1}, c={2}, pos={3}, rot={4}", LogHeader, LocalID, changed, _position, _orientation);
-            // Avatar movement is not done by generating this event. There is a system that
-            //  checks for avatar updates each heartbeat loop.
            // base.RequestPhysicsterseUpdate();
        }
    }
    // Called by the scene when a collision with this object is reported
+    // The collision, if it should be reported to the character, is placed in a collection
+    //   that will later be sent to the simulator when SendCollisions() is called.
    CollisionEventUpdate collisionCollection = null;
    public void Collide(uint collidingWith, ActorTypes type, Vector3 contactPoint, Vector3 contactNormal, float pentrationDepth)
    {
@@ -440,29 +455,34 @@ public class BSCharacter : PhysicsActor
        }
        // throttle collisions to the rate specified in the subscription
-        if (_subscribedEventsMs == 0) return;   // don't want collisions
+        if (_subscribedEventsMs != 0) {
-        int nowTime = _scene.SimulationNowTime;
+            int nowTime = _scene.SimulationNowTime;
-        if (nowTime < (_lastCollisionTime + _subscribedEventsMs)) return;
+            if (nowTime >= _nextCollisionOkTime) {
-        _lastCollisionTime = nowTime;
+                _nextCollisionOkTime = nowTime + _subscribedEventsMs;
-        if (collisionCollection == null)
+                if (collisionCollection == null)
-            collisionCollection = new CollisionEventUpdate();
+                    collisionCollection = new CollisionEventUpdate();
-        collisionCollection.AddCollider(collidingWith, new ContactPoint(contactPoint, contactNormal, pentrationDepth));
+                collisionCollection.AddCollider(collidingWith, new ContactPoint(contactPoint, contactNormal, pentrationDepth));
+            }
+        }
    }
    public void SendCollisions()
    {
-        // if (collisionCollection != null)
+        /*
-        // {
+        if (collisionCollection != null && collisionCollection.Count > 0)
-        //     base.SendCollisionUpdate(collisionCollection);
+        {
-        //     collisionCollection = null;
+            base.SendCollisionUpdate(collisionCollection);
-        // }
+            collisionCollection = null;
+        }
+         */
        // Kludge to make a collision call even if there are no collisions.
        // This causes the avatar animation to get updated.
        if (collisionCollection == null)
            collisionCollection = new CollisionEventUpdate();
        base.SendCollisionUpdate(collisionCollection);
-        collisionCollection = null;
+        collisionCollection.Clear();
+        // End kludge
    }
 }
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSPlugin.cs b/OpenSim/Region/Physics/BulletSPlugin/BSPlugin.cs
index 0730824..0f027b8 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSPlugin.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSPlugin.cs
@@ -32,6 +32,14 @@ using OpenMetaverse;
 namespace OpenSim.Region.Physics.BulletSPlugin
 {
+    /// <summary>
+    /// Entry for a port of Bullet (http://bulletphysics.org/) to OpenSim. 
+    /// This module interfaces to an unmanaged C++ library which makes the
+    /// actual calls into the Bullet physics engine.
+    /// The unmanaged library is found in opensim-libs::trunk/unmanaged/BulletSim/.
+    /// The unmanaged library is compiled and linked statically with Bullet
+    /// to create BulletSim.dll and libBulletSim.so (for both 32 and 64 bit).
+    /// </summary>
 public class BSPlugin : IPhysicsPlugin
 {
    //private static readonly log4net.ILog m_log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
@@ -53,6 +61,9 @@ public class BSPlugin : IPhysicsPlugin
        {
            if (Util.IsWindows())
                Util.LoadArchSpecificWindowsDll("BulletSim.dll");
+            // If not Windows, loading is performed by the
+            // Mono loader as specified in 
+            // "bin/Physics/OpenSim.Region.Physics.BulletSPlugin.dll.config".
            _mScene = new BSScene(sceneIdentifier);
        }
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs b/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
index 248d1f2..130f1ca 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs
@@ -90,7 +90,7 @@ public sealed class BSPrim : PhysicsActor
    private BSPrim _parentPrim;
    private int _subscribedEventsMs = 0;
-    private int _lastCollisionTime = 0;
+    private int _nextCollisionOkTime = 0;
    long _collidingStep;
    long _collidingGroundStep;
@@ -597,7 +597,8 @@ public sealed class BSPrim : PhysicsActor
    }
    public override void SubscribeEvents(int ms) { 
        _subscribedEventsMs = ms;
-        _lastCollisionTime = Util.EnvironmentTickCount() - _subscribedEventsMs; // make first collision happen
+        // make sure first collision happens
+        _nextCollisionOkTime = Util.EnvironmentTickCount() - _subscribedEventsMs;
    }
    public override void UnSubscribeEvents() { 
        _subscribedEventsMs = 0;
@@ -1338,23 +1339,27 @@ public sealed class BSPrim : PhysicsActor
            _collidingGroundStep = _scene.SimulationStep;
        }
-        if (_subscribedEventsMs == 0) return;   // nothing in the object is waiting for collision events
+        // if someone is subscribed to collision events....
-        // throttle the collisions to the number of milliseconds specified in the subscription
+        if (_subscribedEventsMs != 0) {
-        int nowTime = _scene.SimulationNowTime;
+            // throttle the collisions to the number of milliseconds specified in the subscription
-        if (nowTime < (_lastCollisionTime + _subscribedEventsMs)) return;
+            int nowTime = _scene.SimulationNowTime;
-        _lastCollisionTime = nowTime;
+            if (nowTime >= _nextCollisionOkTime) {
+                _nextCollisionOkTime = nowTime + _subscribedEventsMs;
-        if (collisionCollection == null)
+                if (collisionCollection == null)
-            collisionCollection = new CollisionEventUpdate();
+                    collisionCollection = new CollisionEventUpdate();
-        collisionCollection.AddCollider(collidingWith, new ContactPoint(contactPoint, contactNormal, pentrationDepth));
+                collisionCollection.AddCollider(collidingWith, new ContactPoint(contactPoint, contactNormal, pentrationDepth));
+            }
+        }
    }
+    // The scene is telling us it's time to pass our collected collisions into the simulator
    public void SendCollisions()
    {
-        if (collisionCollection != null)
+        if (collisionCollection != null && collisionCollection.Count > 0)
        {
            base.SendCollisionUpdate(collisionCollection);
-            collisionCollection = null;
+            collisionCollection.Clear();
        }
    }
 }
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs b/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
index 94a0ccf..417cb5f 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
@@ -52,6 +52,7 @@ using OpenSim.Region.Framework;
 // Should prim.link() and prim.delink() membership checking happen at taint time?
 // Mesh sharing. Use meshHash to tell if we already have a hull of that shape and only create once
 // Do attachments need to be handled separately? Need collision events. Do not collide with VolumeDetect
+// Use collision masks for collision with terrain and phantom objects 
 // Implement the genCollisions feature in BulletSim::SetObjectProperties (don't pass up unneeded collisions)
 // Implement LockAngularMotion
 // Decide if clearing forces is the right thing to do when setting position (BulletSim::SetObjectTranslation)
@@ -62,9 +63,6 @@ using OpenSim.Region.Framework;
 // Multiple contact points on collision?
 //    See code in ode::near... calls to collision_accounting_events()
 //    (This might not be a problem. ODE collects all the collisions with one object in one tick.)
-// Use collision masks for collision with terrain and phantom objects 
-// Figure out how to not allocate a new Dictionary and List for every collision
-//    in BSPrim.Collide() and BSCharacter.Collide(). Can the same ones be reused?
 // Raycast
 // 
 namespace OpenSim.Region.Physics.BulletSPlugin
@@ -405,6 +403,8 @@ public class BSScene : PhysicsScene, IPhysicsParameters
        // prevent simulation until we've been initialized
        if (!m_initialized) return 10.0f;
+        long simulateStartTime = Util.EnvironmentTickCount();
        // update the prim states while we know the physics engine is not busy
        ProcessTaints();
@@ -437,13 +437,18 @@ public class BSScene : PhysicsScene, IPhysicsParameters
            }
        }
-        // The SendCollision's batch up the collisions on the objects. Now push the collisions into the simulator.
+        // The above SendCollision's batch up the collisions on the objects.
+        //      Now push the collisions into the simulator.
        foreach (BSPrim bsp in m_primsWithCollisions)
            bsp.SendCollisions();
        m_primsWithCollisions.Clear();
+        // This is a kludge to get avatar movement updated. 
+        //   Don't send collisions only if there were collisions -- send everytime.
+        //   ODE sends collisions even if there are none and this is used to update
+        //   avatar animations and stuff.
        // foreach (BSCharacter bsc in m_avatarsWithCollisions)
        //     bsc.SendCollisions();
-        // This is a kludge to get avatar movement updated. ODE sends collisions even if there isn't any
        foreach (KeyValuePair<uint, BSCharacter> kvp in m_avatars)
            kvp.Value.SendCollisions();
        m_avatarsWithCollisions.Clear();
@@ -465,10 +470,12 @@ public class BSScene : PhysicsScene, IPhysicsParameters
                if (m_avatars.TryGetValue(entprop.ID, out actor))
                {
                    actor.UpdateProperties(entprop);
+                    continue;
                }
            }
        }
+        // If enabled, call into the physics engine to dump statistics
        if (m_detailedStatsStep > 0)
        {
            if ((m_simulationStep % m_detailedStatsStep) == 0)
@@ -477,6 +484,11 @@ public class BSScene : PhysicsScene, IPhysicsParameters
            }
        }
+        // this is a waste since the outside routine also calcuates the physics simulation
+        //   period. TODO: There should be a way of computing physics frames from simulator computation.
+        // long simulateTotalTime = Util.EnvironmentTickCountSubtract(simulateStartTime);
+        // return (timeStep * (float)simulateTotalTime);
        // TODO: FIX THIS: fps calculation wrong. This calculation always returns about 1 in normal operation.
        return timeStep / (numSubSteps * m_fixedTimeStep) * 1000f;
    }
@@ -528,6 +540,7 @@ public class BSScene : PhysicsScene, IPhysicsParameters
    public override void SetWaterLevel(float baseheight) 
    {
        m_waterLevel = baseheight;
+        // TODO: pass to physics engine so things will float?
    }
    public float GetWaterLevel()
    {
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
index 77b659b..b639d36 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
@@ -2725,6 +2725,41 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
            }
        }
+        public void osNpcTouch(LSL_Key npcLSL_Key, LSL_Key object_key, LSL_Integer link_num)
+        {
+            CheckThreatLevel(ThreatLevel.High, "osNpcTouch");
+            m_host.AddScriptLPS(1);
+            INPCModule module = World.RequestModuleInterface<INPCModule>();
+            int linkNum = link_num.value;
+            if (module != null || (linkNum < 0 && linkNum != ScriptBaseClass.LINK_THIS))
+            {
+                UUID npcId;
+                if (!UUID.TryParse(npcLSL_Key, out npcId) || !module.CheckPermissions(npcId, m_host.OwnerID))
+                    return;
+                SceneObjectPart part = null;
+                UUID objectId;
+                if (UUID.TryParse(LSL_String.ToString(object_key), out objectId))
+                    part = World.GetSceneObjectPart(objectId);
+                if (part == null)
+                    return;
+                if (linkNum != ScriptBaseClass.LINK_THIS)
+                {
+                    if (linkNum == 0 || linkNum == ScriptBaseClass.LINK_ROOT)
+                    { // 0 and 1 are treated as root, find the root if the current part isnt it
+                        if (!part.IsRoot)
+                            part = part.ParentGroup.RootPart;
+                    }
+                    else
+                    { // Find the prim with the given link number if not found then fail silently
+                        part = part.ParentGroup.GetLinkNumPart(linkNum);
+                        if (part == null)
+                            return;
+                    }
+                }
+                module.Touch(npcId, part.UUID);
+            }
+        }
        /// <summary>
        /// Save the current appearance of the script owner permanently to the named notecard.
        /// </summary>
@@ -3203,13 +3238,32 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
        {
            CheckThreatLevel(ThreatLevel.High, "osForceAttachToAvatarFromInventory");
+            m_host.AddScriptLPS(1);
+            ForceAttachToAvatarFromInventory(m_host.OwnerID, itemName, attachmentPoint);
+        }
+        public void osForceAttachToOtherAvatarFromInventory(string rawAvatarId, string itemName, int attachmentPoint)
+        {
+            CheckThreatLevel(ThreatLevel.Severe, "osForceAttachToOtherAvatarFromInventory");
+            m_host.AddScriptLPS(1);
+            UUID avatarId;
+            if (!UUID.TryParse(rawAvatarId, out avatarId))
+                return;
+            ForceAttachToAvatarFromInventory(avatarId, itemName, attachmentPoint);
+        }
+        public void ForceAttachToAvatarFromInventory(UUID avatarId, string itemName, int attachmentPoint)
+        {
            IAttachmentsModule attachmentsModule = m_ScriptEngine.World.AttachmentsModule;
            if (attachmentsModule == null)
                return;
-            m_host.AddScriptLPS(1);
            InitLSL();
            TaskInventoryItem item = m_host.Inventory.GetInventoryItem(itemName);
@@ -3232,7 +3286,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                return;
            }
-            ScenePresence sp = World.GetScenePresence(m_host.OwnerID);
+            ScenePresence sp = World.GetScenePresence(avatarId);
            if (sp == null)
                return;
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
index a790cdc..1facc96 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
@@ -101,19 +101,33 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
        // Attachment commands
        /// <summary>
-        /// Attach the object containing this script to the avatar that owns it without checking for PERMISSION_ATTACH
+        /// Attach the object containing this script to the avatar that owns it without asking for PERMISSION_ATTACH
        /// </summary>
        /// <param name='attachment'>The attachment point.  For example, ATTACH_CHEST</param>
        void osForceAttachToAvatar(int attachment);
        /// <summary>
-        /// Attach the inventory item in the object containing this script to the avatar that owns it without checking for PERMISSION_ATTACH
+        /// Attach an inventory item in the object containing this script to the avatar that owns it without asking for PERMISSION_ATTACH
        /// </summary>
+        /// <remarks>
+        /// Nothing happens if the owner is not in the region.
+        /// </remarks>
        /// <param name='itemName'>Tha name of the item.  If this is not found then a warning is said to the owner</param>
        /// <param name='attachment'>The attachment point.  For example, ATTACH_CHEST</param>
        void osForceAttachToAvatarFromInventory(string itemName, int attachment);
        /// <summary>
+        /// Attach an inventory item in the object containing this script to any avatar in the region without asking for PERMISSION_ATTACH
+        /// </summary>
+        /// <remarks>
+        /// Nothing happens if the avatar is not in the region.
+        /// </remarks>
+        /// <param name='rawAvatarId'>The UUID of the avatar to which to attach.  Nothing happens if this is not a UUID</para>
+        /// <param name='itemName'>The name of the item.  If this is not found then a warning is said to the owner</param>
+        /// <param name='attachment'>The attachment point.  For example, ATTACH_CHEST</param>
+        void osForceAttachToOtherAvatarFromInventory(string rawAvatarId, string itemName, int attachmentPoint);
+        /// <summary>
        /// Detach the object containing this script from the avatar it is attached to without checking for PERMISSION_ATTACH
        /// </summary>
        /// <remarks>Nothing happens if the object is not attached.</remarks>
@@ -231,6 +245,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
        void        osNpcRemove(key npc);
        void        osNpcPlayAnimation(LSL_Key npc, string animation);
        void        osNpcStopAnimation(LSL_Key npc, string animation);
+        void        osNpcTouch(LSL_Key npcLSL_Key, LSL_Key object_key, LSL_Integer link_num);
        void        osNpcWhisper(key npc, int channel, string message);
        LSL_Key     osOwnerSaveAppearance(string notecard);
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
index 500ed96..b40bdf0 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
@@ -301,6 +301,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
            m_OSSL_Functions.osForceAttachToAvatarFromInventory(itemName, attachmentPoint);
        }
+        public void osForceAttachToOtherAvatarFromInventory(string rawAvatarId, string itemName, int attachmentPoint)
+        {
+            m_OSSL_Functions.osForceAttachToOtherAvatarFromInventory(rawAvatarId, itemName, attachmentPoint);
+        }
        public void osForceDetachFromAvatar()
        {
            m_OSSL_Functions.osForceDetachFromAvatar();
@@ -626,6 +631,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
            m_OSSL_Functions.osNpcWhisper(npc, channel, message);
        }
+        public void osNpcTouch(LSL_Key npcLSL_Key, LSL_Key object_key, LSL_Integer link_num)
+        {
+            m_OSSL_Functions.osNpcTouch(npcLSL_Key, object_key, link_num);
+        }
        public LSL_Key osOwnerSaveAppearance(string notecard)
        {
            return m_OSSL_Functions.osOwnerSaveAppearance(notecard);
diff --git a/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiAppearanceTest.cs b/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiAppearanceTest.cs
index 3965734..c8718d9 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiAppearanceTest.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiAppearanceTest.cs
@@ -79,7 +79,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
        /// Test creation of an NPC where the appearance data comes from a notecard
        /// </summary>
        [Test]
-        public void TestOsNpcCreateFromNotecard()
+        public void TestOsNpcCreateUsingAppearanceFromNotecard()
        {
            TestHelpers.InMethod();
 //            log4net.Config.XmlConfigurator.Configure();
@@ -90,7 +90,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
            ScenePresence sp = SceneHelpers.AddScenePresence(m_scene, userId);
            sp.Appearance.AvatarHeight = newHeight;
-            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId);
+            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId, 0x10);
            SceneObjectPart part = so.RootPart;
            m_scene.AddSceneObject(so);
@@ -114,10 +114,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
        /// Test creation of an NPC where the appearance data comes from an avatar already in the region.
        /// </summary>
        [Test]
-        public void TestOsNpcCreateFromAvatar()
+        public void TestOsNpcCreateUsingAppearanceFromAvatar()
        {
            TestHelpers.InMethod();
-//            log4net.Config.XmlConfigurator.Configure();
+//            TestHelpers.EnableLogging();
            // Store an avatar with a different height from default in a notecard.
            UUID userId = TestHelpers.ParseTail(0x1);
@@ -125,7 +125,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
            ScenePresence sp = SceneHelpers.AddScenePresence(m_scene, userId);
            sp.Appearance.AvatarHeight = newHeight;
-            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId);
+            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId, 0x10);
            SceneObjectPart part = so.RootPart;
            m_scene.AddSceneObject(so);
@@ -156,7 +156,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
            ScenePresence sp = SceneHelpers.AddScenePresence(m_scene, userId);
            sp.Appearance.AvatarHeight = newHeight;
-            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId);
+            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId, 0x10);
            SceneObjectPart part = so.RootPart;
            m_scene.AddSceneObject(so);
@@ -197,7 +197,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
            ScenePresence sp = SceneHelpers.AddScenePresence(m_scene, nonOwnerId);
            sp.Appearance.AvatarHeight = newHeight;
-            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, ownerId);
+            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, ownerId, 0x10);
            SceneObjectPart part = so.RootPart;
            m_scene.AddSceneObject(so);
diff --git a/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiAttachmentTests.cs b/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiAttachmentTests.cs
index 537b8aa..5ed1f3d 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiAttachmentTests.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiAttachmentTests.cs
@@ -158,7 +158,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
            {
                osslApi.osForceAttachToAvatarFromInventory(taskInvObjItemName, (int)attachPoint);
            }
-            catch (Exception e)
+            catch (Exception)
            {
                exceptionCaught = true;
            }
@@ -174,5 +174,58 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
            List<AvatarAttachment> attachmentsInAppearance = sp.Appearance.GetAttachments();
            Assert.That(attachmentsInAppearance.Count, Is.EqualTo(0));
        }
+        [Test]
+        public void TestOsForceAttachToOtherAvatarFromInventory()
+        {
+            TestHelpers.InMethod();
+//            TestHelpers.EnableLogging();
+            string taskInvObjItemName = "sphere";
+            UUID taskInvObjItemId = UUID.Parse("00000000-0000-0000-0000-100000000000");
+            AttachmentPoint attachPoint = AttachmentPoint.Chin;
+            UserAccount ua1 = UserAccountHelpers.CreateUserWithInventory(m_scene, "user", "one", 0x1, "pass");
+            UserAccount ua2 = UserAccountHelpers.CreateUserWithInventory(m_scene, "user", "two", 0x2, "pass");
+            ScenePresence sp = SceneHelpers.AddScenePresence(m_scene, ua1);
+            SceneObjectGroup inWorldObj = SceneHelpers.AddSceneObject(m_scene, "inWorldObj", ua1.PrincipalID);
+            TaskInventoryItem scriptItem = TaskInventoryHelpers.AddScript(m_scene, inWorldObj.RootPart);
+            new LSL_Api().Initialize(m_engine, inWorldObj.RootPart, scriptItem);
+            OSSL_Api osslApi = new OSSL_Api();
+            osslApi.Initialize(m_engine, inWorldObj.RootPart, scriptItem);
+            // Create an object embedded inside the first
+            TaskInventoryHelpers.AddSceneObject(m_scene, inWorldObj.RootPart, taskInvObjItemName, taskInvObjItemId, ua1.PrincipalID);
+            ScenePresence sp2 = SceneHelpers.AddScenePresence(m_scene, ua2);
+            osslApi.osForceAttachToOtherAvatarFromInventory(sp2.UUID.ToString(), taskInvObjItemName, (int)attachPoint);
+            // Check scene presence status
+            Assert.That(sp.HasAttachments(), Is.False);
+            List<SceneObjectGroup> attachments = sp.GetAttachments();
+            Assert.That(attachments.Count, Is.EqualTo(0));
+            Assert.That(sp2.HasAttachments(), Is.True);
+            List<SceneObjectGroup> attachments2 = sp2.GetAttachments();
+            Assert.That(attachments2.Count, Is.EqualTo(1));
+            SceneObjectGroup attSo = attachments2[0];
+            Assert.That(attSo.Name, Is.EqualTo(taskInvObjItemName));
+            Assert.That(attSo.OwnerID, Is.EqualTo(ua2.PrincipalID));
+            Assert.That(attSo.AttachmentPoint, Is.EqualTo((uint)attachPoint));
+            Assert.That(attSo.IsAttachment);
+            Assert.That(attSo.UsesPhysics, Is.False);
+            Assert.That(attSo.IsTemporary, Is.False);
+            // Check appearance status
+            List<AvatarAttachment> attachmentsInAppearance = sp.Appearance.GetAttachments();
+            Assert.That(attachmentsInAppearance.Count, Is.EqualTo(0));
+            List<AvatarAttachment> attachmentsInAppearance2 = sp2.Appearance.GetAttachments();
+            Assert.That(attachmentsInAppearance2.Count, Is.EqualTo(1));
+            Assert.That(sp2.Appearance.GetAttachpoint(attachmentsInAppearance2[0].ItemID), Is.EqualTo((uint)attachPoint));
+        }
    }
 }
 \ No newline at end of file
diff --git a/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiNpcTests.cs b/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiNpcTests.cs
index 813e53b..25679a6 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiNpcTests.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Tests/OSSL_ApiNpcTests.cs
@@ -97,11 +97,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
            ScenePresence sp = SceneHelpers.AddScenePresence(m_scene, userId);
            sp.Appearance.AvatarHeight = newHeight;
-            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId);
+            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId, 0x10);
            SceneObjectPart part = so.RootPart;
            m_scene.AddSceneObject(so);
-            SceneObjectGroup otherSo = SceneHelpers.CreateSceneObject(1, otherUserId);
+            SceneObjectGroup otherSo = SceneHelpers.CreateSceneObject(1, otherUserId, 0x20);
            SceneObjectPart otherPart = otherSo.RootPart;
            m_scene.AddSceneObject(otherSo);
@@ -148,7 +148,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
            ScenePresence sp = SceneHelpers.AddScenePresence(m_scene, userId);
            sp.Appearance.AvatarHeight = newHeight;
-            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId);
+            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId, 0x10);
            SceneObjectPart part = so.RootPart;
            m_scene.AddSceneObject(so);
diff --git a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
index 7364b19..2886344 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
@@ -1662,7 +1662,11 @@ namespace OpenSim.Region.ScriptEngine.XEngine
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance != null)
-                instance.Stop(0);
+            {
+                // Give the script some time to finish processing its last event.  Simply aborting the script thread can
+                // cause issues on mono 2.6, 2.10 and possibly later where locks are not released properly on abort.
+                instance.Stop(1000);
+            }
        }
        public DetectParams GetDetectParams(UUID itemID, int idx)