13 files changed, 132 insertions, 124 deletions

diff --git a/OpenSim/Capabilities/Handlers/WebFetchInventoryDescendents/WebFetchInvDescHandler.cs b/OpenSim/Capabilities/Handlers/WebFetchInventoryDescendents/WebFetchInvDescHandler.cs
index 515637e..9a6ca86 100644
--- a/OpenSim/Capabilities/Handlers/WebFetchInventoryDescendents/WebFetchInvDescHandler.cs
+++ b/OpenSim/Capabilities/Handlers/WebFetchInventoryDescendents/WebFetchInvDescHandler.cs
@@ -301,7 +301,8 @@ namespace OpenSim.Capabilities.Handlers
                                         InventoryItemBase linkedItem
                                             = m_InventoryService.GetItem(new InventoryItemBase(link.AssetID));
 
-                                        itemsToReturn.Insert(0, linkedItem);
+                                        if (linkedItem != null)
+                                            itemsToReturn.Insert(0, linkedItem);
                                     }
                                 }
                             }
diff --git a/OpenSim/Framework/IScene.cs b/OpenSim/Framework/IScene.cs
index b2604f4..a9432c2 100644
--- a/OpenSim/Framework/IScene.cs
+++ b/OpenSim/Framework/IScene.cs
@@ -56,6 +56,11 @@ namespace OpenSim.Framework
 
     public interface IScene
     {
+        /// <summary>
+        /// The name of this scene.
+        /// </summary>
+        string Name { get; }
+
         RegionInfo RegionInfo { get; }
         RegionStatus RegionStatus { get; set; }
 
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/Tests/MockScene.cs b/OpenSim/Region/ClientStack/Linden/UDP/Tests/MockScene.cs
index d76927b..119a677 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/Tests/MockScene.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/Tests/MockScene.cs
@@ -44,9 +44,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
         }
         protected int m_objectNameCallsReceived;
         
-        public MockScene()
+        public MockScene() : base(new RegionInfo(1000, 1000, null, null))
         {
-            m_regInfo = new RegionInfo(1000, 1000, null, null);
             m_regStatus = RegionStatus.Up;
         }
         
diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
index fcf682b..1fa5ec0 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
@@ -366,10 +366,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                     // At the moment we can only deal with a single attachment
                     if (attachments.Count != 0)
                     {
-                        UUID oldAttachmentItemID = attachments[0].FromItemID;
-        
-                        if (oldAttachmentItemID != UUID.Zero)
-                            DetachSingleAttachmentToInvInternal(sp, oldAttachmentItemID);
+                        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!",
@@ -434,12 +432,7 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                 return null;
             }
 
-            SceneObjectGroup att = RezSingleAttachmentFromInventoryInternal(sp, itemID, UUID.Zero, AttachmentPt, doc);
-
-            if (att == null)
-                DetachSingleAttachmentToInv(sp, itemID);
-
-            return att;
+            return RezSingleAttachmentFromInventoryInternal(sp, itemID, UUID.Zero, AttachmentPt, doc);
         }
 
         public void RezMultipleAttachmentsFromInventory(IScenePresence sp, List<KeyValuePair<UUID, uint>> rezlist)
@@ -516,18 +509,27 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
             m_scene.EventManager.TriggerOnAttach(so.LocalId, so.UUID, UUID.Zero);
         }
 
-        public void DetachSingleAttachmentToInv(IScenePresence sp, UUID itemID)
+        public void DetachSingleAttachmentToInv(IScenePresence sp, SceneObjectGroup so)
         {
             lock (sp.AttachmentsSyncLock)
             {
                 // Save avatar attachment information
 //                m_log.Debug("[ATTACHMENTS MODULE]: Detaching from UserID: " + sp.UUID + ", ItemID: " + itemID);
 
-                bool changed = sp.Appearance.DetachAttachment(itemID);
+                if (so.AttachedAvatar != sp.UUID)
+                {
+                    m_log.WarnFormat(
+                        "[ATTACHMENTS MODULE]: Tried to detach object {0} from {1} {2} but attached avatar id was {3} in {4}",
+                        so.Name, sp.Name, sp.UUID, so.AttachedAvatar, m_scene.RegionInfo.RegionName);
+
+                    return;
+                }
+
+                bool changed = sp.Appearance.DetachAttachment(so.FromItemID);
                 if (changed && m_scene.AvatarFactory != null)
                     m_scene.AvatarFactory.QueueAppearanceSave(sp.UUID);
 
-                DetachSingleAttachmentToInvInternal(sp, itemID);
+                DetachSingleAttachmentToInvInternal(sp, so);
             }
         }
         
@@ -794,46 +796,21 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
             return item;
         }
 
-        // What makes this method odd and unique is it tries to detach using an UUID....     Yay for standards.
-        // To LocalId or UUID, *THAT* is the question. How now Brown UUID??
-        private void DetachSingleAttachmentToInvInternal(IScenePresence sp, UUID itemID)
+        private void DetachSingleAttachmentToInvInternal(IScenePresence sp, SceneObjectGroup so)
         {
             //            m_log.DebugFormat("[ATTACHMENTS MODULE]: Detaching item {0} to inventory for {1}", itemID, sp.Name);
 
-            if (itemID == UUID.Zero) // If this happened, someone made a mistake....
-                return;
-
-            // We can NOT use the dictionries here, as we are looking
-            // for an entity by the fromAssetID, which is NOT the prim UUID
-            EntityBase[] detachEntities = m_scene.GetEntities();
-            SceneObjectGroup group;
-
-            lock (sp.AttachmentsSyncLock)
-            {
-                foreach (EntityBase entity in detachEntities)
-                {
-                    if (entity is SceneObjectGroup)
-                    {
-                        group = (SceneObjectGroup)entity;
-                        if (group.FromItemID == itemID)
-                        {
-                            m_scene.EventManager.TriggerOnAttach(group.LocalId, itemID, UUID.Zero);
-                            sp.RemoveAttachment(group);
-                            m_scene.DeleteSceneObject(group, false);
-
-                            // Prepare sog for storage
-                            group.AttachedAvatar = UUID.Zero;
-                            group.RootPart.SetParentLocalId(0);
-                            group.IsAttachment = false;
-                            group.AbsolutePosition = group.RootPart.AttachedPos;
+            m_scene.EventManager.TriggerOnAttach(so.LocalId, so.FromItemID, UUID.Zero);
+            sp.RemoveAttachment(so);
+            m_scene.DeleteSceneObject(so, false);
 
-                            UpdateKnownItem(sp, group, true);
+            // Prepare sog for storage
+            so.AttachedAvatar = UUID.Zero;
+            so.RootPart.SetParentLocalId(0);
+            so.IsAttachment = false;
+            so.AbsolutePosition = so.RootPart.AttachedPos;
 
-                            return;
-                        }
-                    }
-                }
-            }
+            UpdateKnownItem(sp, so, true);
         }
 
         protected SceneObjectGroup RezSingleAttachmentFromInventoryInternal(
@@ -1047,8 +1024,9 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
 
             ScenePresence sp = m_scene.GetScenePresence(remoteClient.AgentId);
             SceneObjectGroup group = m_scene.GetGroupByPrim(objectLocalID);
+
             if (sp != null && group != null)
-                DetachSingleAttachmentToInv(sp, group.FromItemID);
+                DetachSingleAttachmentToInv(sp, group);
         }
 
         private void Client_OnDetachAttachmentIntoInv(UUID itemID, IClientAPI remoteClient)
@@ -1058,7 +1036,21 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
 
             ScenePresence sp = m_scene.GetScenePresence(remoteClient.AgentId);
             if (sp != null)
-                DetachSingleAttachmentToInv(sp, itemID);
+            {
+                lock (sp.AttachmentsSyncLock)
+                {
+                    List<SceneObjectGroup> attachments = sp.GetAttachments();
+    
+                    foreach (SceneObjectGroup group in attachments)
+                    {
+                        if (group.FromItemID == itemID)
+                        {
+                            DetachSingleAttachmentToInv(sp, group);
+                            return;
+                        }
+                    }
+                }
+            }
         }
 
         private void Client_OnObjectDrop(uint soLocalId, IClientAPI remoteClient)
diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
index 1c10422..df99d0c 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
@@ -227,9 +227,10 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
 
             InventoryItemBase attItem = CreateAttachmentItem(scene, ua1.PrincipalID, "att", 0x10, 0x20);
 
-            scene.AttachmentsModule.RezSingleAttachmentFromInventory(
-                sp, attItem.ID, (uint)AttachmentPoint.Chest);
-            scene.AttachmentsModule.DetachSingleAttachmentToInv(sp, attItem.ID);
+            SceneObjectGroup so
+                = (SceneObjectGroup)scene.AttachmentsModule.RezSingleAttachmentFromInventory(
+                    sp, attItem.ID, (uint)AttachmentPoint.Chest);
+            scene.AttachmentsModule.DetachSingleAttachmentToInv(sp, so);
 
             // Check status on scene presence
             Assert.That(sp.HasAttachments(), Is.False);
diff --git a/OpenSim/Region/Framework/Interfaces/IAttachmentsModule.cs b/OpenSim/Region/Framework/Interfaces/IAttachmentsModule.cs
index 7446530..e7b9ba5 100644
--- a/OpenSim/Region/Framework/Interfaces/IAttachmentsModule.cs
+++ b/OpenSim/Region/Framework/Interfaces/IAttachmentsModule.cs
@@ -114,11 +114,11 @@ namespace OpenSim.Region.Framework.Interfaces
         void DetachSingleAttachmentToGround(IScenePresence sp, uint objectLocalID);
 
         /// <summary>
-        /// Detach the given item so that it remains in the user's inventory.
+        /// Detach the given attachment so that it remains in the user's inventory.
         /// </summary>
         /// <param name="sp">/param>
-        /// <param name="itemID"></param>
-        void DetachSingleAttachmentToInv(IScenePresence sp, UUID itemID);
+        /// <param name="grp">The attachment to detach.</param>
+        void DetachSingleAttachmentToInv(IScenePresence sp, SceneObjectGroup grp);
         
         /// Update the position of an attachment.
         /// </summary>
diff --git a/OpenSim/Region/Framework/Interfaces/IScenePresence.cs b/OpenSim/Region/Framework/Interfaces/IScenePresence.cs
index 19a8236..e6b926c 100644
--- a/OpenSim/Region/Framework/Interfaces/IScenePresence.cs
+++ b/OpenSim/Region/Framework/Interfaces/IScenePresence.cs
@@ -72,6 +72,10 @@ namespace OpenSim.Region.Framework.Interfaces
         /// <returns></returns>
         List<SceneObjectGroup> GetAttachments(uint attachmentPoint);
 
+        /// <summary>
+        /// Does this avatar have any attachments?
+        /// </summary>
+        /// <returns></returns>
         bool HasAttachments();
 
         // Don't use these methods directly.  Instead, use the AttachmentsModule
diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 8591b09..8c76b82 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -637,7 +637,6 @@ namespace OpenSim.Region.Framework.Scenes
             m_SimulationDataService = simDataService;
             m_EstateDataService = estateDataService;
             m_regionHandle = m_regInfo.RegionHandle;
-            m_regionName = m_regInfo.RegionName;
             m_lastIncoming = 0;
             m_lastOutgoing = 0;
 
@@ -654,7 +653,7 @@ namespace OpenSim.Region.Framework.Scenes
             // resave.
             // FIXME: It shouldn't be up to the database plugins to create this data - we should do it when a new
             // region is set up and avoid these gyrations.
-            RegionSettings rs = simDataService.LoadRegionSettings(m_regInfo.RegionID);
+            RegionSettings rs = simDataService.LoadRegionSettings(RegionInfo.RegionID);
             bool updatedTerrainTextures = false;
             if (rs.TerrainTexture1 == UUID.Zero)
             {
@@ -683,10 +682,10 @@ namespace OpenSim.Region.Framework.Scenes
             if (updatedTerrainTextures)
                 rs.Save();
 
-            m_regInfo.RegionSettings = rs;
+            RegionInfo.RegionSettings = rs;
 
             if (estateDataService != null)
-                m_regInfo.EstateSettings = estateDataService.LoadEstateSettings(m_regInfo.RegionID, false);
+                RegionInfo.EstateSettings = estateDataService.LoadEstateSettings(RegionInfo.RegionID, false);
 
             #endregion Region Settings
 
@@ -861,7 +860,7 @@ namespace OpenSim.Region.Framework.Scenes
             StatsReporter.OnStatsIncorrect += m_sceneGraph.RecalculateStats;
         }
 
-        public Scene(RegionInfo regInfo)
+        public Scene(RegionInfo regInfo) : base(regInfo)
         {
             PhysicalPrims = true;
             CollidablePrims = true;
@@ -888,7 +887,6 @@ namespace OpenSim.Region.Framework.Scenes
             WestBorders.Add(westBorder);
             BordersLocked = false;
 
-            m_regInfo = regInfo;
             m_eventManager = new EventManager();
 
             m_permissions = new ScenePermissions(this);
@@ -1232,8 +1230,8 @@ namespace OpenSim.Region.Framework.Scenes
 
             m_sceneGraph.Close();
 
-            if (!GridService.DeregisterRegion(m_regInfo.RegionID))
-                m_log.WarnFormat("[SCENE]: Deregister from grid failed for region {0}", m_regInfo.RegionName);
+            if (!GridService.DeregisterRegion(RegionInfo.RegionID))
+                m_log.WarnFormat("[SCENE]: Deregister from grid failed for region {0}", Name);
 
             // call the base class Close method.
             base.Close();
@@ -1770,14 +1768,14 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void StoreWindlightProfile(RegionLightShareData wl)
         {
-            m_regInfo.WindlightSettings = wl;
+            RegionInfo.WindlightSettings = wl;
             SimulationDataService.StoreRegionWindlightSettings(wl);
             m_eventManager.TriggerOnSaveNewWindlightProfile();
         }
 
         public void LoadWindlightProfile()
         {
-            m_regInfo.WindlightSettings = SimulationDataService.LoadRegionWindlightSettings(RegionInfo.RegionID);
+            RegionInfo.WindlightSettings = SimulationDataService.LoadRegionWindlightSettings(RegionInfo.RegionID);
             m_eventManager.TriggerOnSaveNewWindlightProfile();
         }
 
@@ -2318,7 +2316,7 @@ namespace OpenSim.Region.Framework.Scenes
                         ForceSceneObjectBackup(so);                
                     
                     so.DetachFromBackup();
-                    SimulationDataService.RemoveObject(so.UUID, m_regInfo.RegionID);                                        
+                    SimulationDataService.RemoveObject(so.UUID, RegionInfo.RegionID);
                 }
                                     
                 // We need to keep track of this state in case this group is still queued for further backup.
@@ -2662,7 +2660,7 @@ namespace OpenSim.Region.Framework.Scenes
             // enter. Period.
             //
             int flags = GetUserFlags(sceneObject.OwnerID);
-            if (m_regInfo.EstateSettings.IsBanned(sceneObject.OwnerID, flags))
+            if (RegionInfo.EstateSettings.IsBanned(sceneObject.OwnerID, flags))
             {
                 m_log.InfoFormat("[INTERREGION]: Denied prim crossing for banned avatar {0}", sceneObject.OwnerID);
 
@@ -3908,9 +3906,9 @@ namespace OpenSim.Region.Framework.Scenes
                 }
             }
 
-            if (m_regInfo.EstateSettings != null)
+            if (RegionInfo.EstateSettings != null)
             {
-                if (m_regInfo.EstateSettings.IsBanned(agent.AgentID,0))
+                if (RegionInfo.EstateSettings.IsBanned(agent.AgentID, 0))
                 {
                     m_log.WarnFormat("[CONNECTION BEGIN]: Denied access to: {0} ({1} {2}) at {3} because the user is on the banlist",
                                      agent.AgentID, agent.firstname, agent.lastname, RegionInfo.RegionName);
@@ -3942,7 +3940,7 @@ namespace OpenSim.Region.Framework.Scenes
             }
 
             bool groupAccess = false;
-            UUID[] estateGroups = m_regInfo.EstateSettings.EstateGroups;
+            UUID[] estateGroups = RegionInfo.EstateSettings.EstateGroups;
 
             if (estateGroups != null)
             {
@@ -3960,8 +3958,8 @@ namespace OpenSim.Region.Framework.Scenes
                 m_log.ErrorFormat("[CONNECTION BEGIN]: EstateGroups is null!");
             }
 
-            if (!m_regInfo.EstateSettings.PublicAccess &&
-                !m_regInfo.EstateSettings.HasAccess(agent.AgentID) &&
+            if (!RegionInfo.EstateSettings.PublicAccess &&
+                !RegionInfo.EstateSettings.HasAccess(agent.AgentID) &&
                 !groupAccess)
             {
                 m_log.WarnFormat("[CONNECTION BEGIN]: Denied access to: {0} ({1} {2}) at {3} because the user does not have access to the estate",
@@ -4034,7 +4032,7 @@ namespace OpenSim.Region.Framework.Scenes
 //            if (loggingOffUser != null)
 //            {
 //                UUID localRegionSecret = UUID.Zero;
-//                bool parsedsecret = UUID.TryParse(m_regInfo.regionSecret, out localRegionSecret);
+//                bool parsedsecret = UUID.TryParse(RegionInfo.regionSecret, out localRegionSecret);
 //
 //                // Region Secret is used here in case a new sessionid overwrites an old one on the user server.
 //                // Will update the user server in a few revisions to use it.
@@ -4272,13 +4270,13 @@ namespace OpenSim.Region.Framework.Scenes
             ScenePresence sp = GetScenePresence(remoteClient.AgentId);
             if (sp != null)
             {
-                uint regionX = m_regInfo.RegionLocX;
-                uint regionY = m_regInfo.RegionLocY;
+                uint regionX = RegionInfo.RegionLocX;
+                uint regionY = RegionInfo.RegionLocY;
 
                 Utils.LongToUInts(regionHandle, out regionX, out regionY);
 
-                int shiftx = (int) regionX - (int) m_regInfo.RegionLocX * (int)Constants.RegionSize;
-                int shifty = (int) regionY - (int) m_regInfo.RegionLocY * (int)Constants.RegionSize;
+                int shiftx = (int) regionX - (int) RegionInfo.RegionLocX * (int)Constants.RegionSize;
+                int shifty = (int) regionY - (int) RegionInfo.RegionLocY * (int)Constants.RegionSize;
 
                 position.X += shiftx;
                 position.Y += shifty;
@@ -4301,7 +4299,7 @@ namespace OpenSim.Region.Framework.Scenes
 
                 if (!result)
                 {
-                    regionHandle = m_regInfo.RegionHandle;
+                    regionHandle = RegionInfo.RegionHandle;
                 }
                 else
                 {
@@ -4807,7 +4805,7 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void DeleteFromStorage(UUID uuid)
         {
-            SimulationDataService.RemoveObject(uuid, m_regInfo.RegionID);
+            SimulationDataService.RemoveObject(uuid, RegionInfo.RegionID);
         }
 
         public int GetHealth(out int flags, out string message)
@@ -5288,7 +5286,7 @@ Environment.Exit(1);
             IEstateDataService estateDataService = EstateDataService;
             if (estateDataService != null)
             {
-                m_regInfo.EstateSettings = estateDataService.LoadEstateSettings(m_regInfo.RegionID, false);
+                RegionInfo.EstateSettings = estateDataService.LoadEstateSettings(RegionInfo.RegionID, false);
                 TriggerEstateSunUpdate();
             }
         }
diff --git a/OpenSim/Region/Framework/Scenes/SceneBase.cs b/OpenSim/Region/Framework/Scenes/SceneBase.cs
index 9b8a3ae..e8134cd 100644
--- a/OpenSim/Region/Framework/Scenes/SceneBase.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneBase.cs
@@ -51,6 +51,8 @@ namespace OpenSim.Region.Framework.Scenes
         #endregion
 
         #region Fields
+
+        public string Name { get { return RegionInfo.RegionName; } }
         
         public IConfigSource Config
         {
@@ -148,6 +150,11 @@ namespace OpenSim.Region.Framework.Scenes
 
         #endregion
 
+        public SceneBase(RegionInfo regInfo)
+        {
+            RegionInfo = regInfo;
+        }
+
         #region Update Methods
 
         /// <summary>
@@ -211,10 +218,7 @@ namespace OpenSim.Region.Framework.Scenes
         ///
         /// </summary>
         /// <returns></returns>
-        public virtual RegionInfo RegionInfo
-        {
-            get { return m_regInfo; }
-        }
+        public virtual RegionInfo RegionInfo { get; private set; }
 
         #region admin stuff
         
diff --git a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
index 54b69a2..f3b0630 100644
--- a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
+++ b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
@@ -1270,7 +1270,7 @@ namespace OpenSim.Region.Physics.OdePlugin
 
         public override void UnSubscribeEvents()
         {
-            CollisionEventsThisFrame.Clear();
+            _parent_scene.RemoveCollisionEventReporting(this);
 
             // Don't clear collision event reporting here.  This is called directly from scene code and so can lead
             // to a race condition with the simulate loop
diff --git a/OpenSim/Region/Physics/OdePlugin/OdeScene.cs b/OpenSim/Region/Physics/OdePlugin/OdeScene.cs
index c6ecc68..32e81e2 100644
--- a/OpenSim/Region/Physics/OdePlugin/OdeScene.cs
+++ b/OpenSim/Region/Physics/OdePlugin/OdeScene.cs
@@ -387,12 +387,12 @@ namespace OpenSim.Region.Physics.OdePlugin
         /// <summary>
         /// A dictionary of actors that should receive collision events.
         /// </summary>
-        private readonly Dictionary<uint, PhysicsActor> _collisionEventPrim = new Dictionary<uint, PhysicsActor>();
+        private readonly Dictionary<uint, PhysicsActor> m_collisionEventActors = new Dictionary<uint, PhysicsActor>();
 
         /// <summary>
         /// A dictionary of collision event changes that are waiting to be processed.
         /// </summary>
-        private readonly Dictionary<uint, PhysicsActor> _collisionEventPrimChanges = new Dictionary<uint, PhysicsActor>();
+        private readonly Dictionary<uint, PhysicsActor> m_collisionEventActorsChanges = new Dictionary<uint, PhysicsActor>();
 
         /// <summary>
         /// Maps a unique geometry id (a memory location) to a physics actor name.
@@ -1908,8 +1908,8 @@ namespace OpenSim.Region.Physics.OdePlugin
         {
 //            m_log.DebugFormat("[PHYSICS]: Adding {0} {1} to collision event reporting", obj.SOPName, obj.LocalID);
             
-            lock (_collisionEventPrimChanges)
-                _collisionEventPrimChanges[obj.LocalID] = obj;
+            lock (m_collisionEventActorsChanges)
+                m_collisionEventActorsChanges[obj.LocalID] = obj;
         }
 
         /// <summary>
@@ -1920,8 +1920,8 @@ namespace OpenSim.Region.Physics.OdePlugin
         {
 //            m_log.DebugFormat("[PHYSICS]: Removing {0} {1} from collision event reporting", obj.SOPName, obj.LocalID);
 
-            lock (_collisionEventPrimChanges)
-                _collisionEventPrimChanges[obj.LocalID] = null;
+            lock (m_collisionEventActorsChanges)
+                m_collisionEventActorsChanges[obj.LocalID] = null;
         }
 
         #region Add/Remove Entities
@@ -2930,17 +2930,17 @@ namespace OpenSim.Region.Physics.OdePlugin
             // We change _collisionEventPrimChanges to avoid locking _collisionEventPrim itself and causing potential
             // deadlock if the collision event tries to lock something else later on which is already locked by a
             // caller that is adding or removing the collision event.
-            lock (_collisionEventPrimChanges)
+            lock (m_collisionEventActorsChanges)
             {
-                foreach (KeyValuePair<uint, PhysicsActor> kvp in _collisionEventPrimChanges)
+                foreach (KeyValuePair<uint, PhysicsActor> kvp in m_collisionEventActorsChanges)
                 {
                     if (kvp.Value == null)
-                        _collisionEventPrim.Remove(kvp.Key);
+                        m_collisionEventActors.Remove(kvp.Key);
                     else
-                        _collisionEventPrim[kvp.Key] = kvp.Value;
+                        m_collisionEventActors[kvp.Key] = kvp.Value;
                 }
 
-                _collisionEventPrimChanges.Clear();
+                m_collisionEventActorsChanges.Clear();
             }
 
             if (SupportsNINJAJoints)
@@ -3092,7 +3092,7 @@ namespace OpenSim.Region.Physics.OdePlugin
                             tempTick = tempTick2;
                         }
 
-                        foreach (PhysicsActor obj in _collisionEventPrim.Values)
+                        foreach (PhysicsActor obj in m_collisionEventActors.Values)
                         {
 //                                m_log.DebugFormat("[PHYSICS]: Assessing {0} {1} for collision events", obj.SOPName, obj.LocalID);
 
@@ -3227,10 +3227,10 @@ namespace OpenSim.Region.Physics.OdePlugin
                 }
 
                 tickCountFrameRun = Util.EnvironmentTickCount();
-            }
 
-            if (CollectStats)
-                m_stats[ODETotalFrameMsStatName] += Util.EnvironmentTickCountSubtract(startFrameTick);
+                if (CollectStats)
+                    m_stats[ODETotalFrameMsStatName] += Util.EnvironmentTickCountSubtract(startFrameTick);
+            }
 
             return fps;
         }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 389980e..04c4c00 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -3267,15 +3267,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
         private void DetachWrapper(object o)
         {
-            SceneObjectPart host = (SceneObjectPart)o;
-
-            SceneObjectGroup grp = host.ParentGroup;
-            UUID itemID = grp.FromItemID;
-            ScenePresence presence = World.GetScenePresence(host.OwnerID);
-
-            IAttachmentsModule attachmentsModule = m_ScriptEngine.World.AttachmentsModule;
-            if (attachmentsModule != null)
-                attachmentsModule.DetachSingleAttachmentToInv(presence, itemID);
+            if (World.AttachmentsModule != null)
+            {
+                SceneObjectPart host = (SceneObjectPart)o;
+                ScenePresence presence = World.GetScenePresence(host.OwnerID);
+                World.AttachmentsModule.DetachSingleAttachmentToInv(presence, host.ParentGroup);
+            }
         }
 
         public void llAttachToAvatar(int attachmentPoint)
diff --git a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
index 79d1944..7364b19 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
@@ -847,27 +847,34 @@ namespace OpenSim.Region.ScriptEngine.XEngine
                         if (engine == ScriptEngineName)
                         {
                             // If we are falling back on XEngine as the default engine, then only complain to the user
-                            // if a script language has been explicitly set and it's one that we recognize.  If it's
+                            // if a script language has been explicitly set and it's one that we recognize or there are
+                            // no non-whitespace characters after the colon.
+                            //
+                            // If the script is
                             // explicitly not allowed or the script is not in LSL then the user will be informed by a later compiler message.
                             //
+                            // If the colon ends the line then we'll risk the false positive as this is more likely
+                            // to signal a real scriptengine line where the user wants to use the default compile language.
+                            //
                             // This avoids the overwhelming number of false positives where we're in this code because
                             // there's a colon in a comment in the first line of a script for entirely
                             // unrelated reasons (e.g. vim settings).
                             //
                             // TODO: A better fix would be to deprecate simple : detection and look for some less likely
                             // string to begin the comment (like #! in unix shell scripts).
-                            bool scriptExplicitlyInXEngineLanguage = false;
-                            string restOfScript = script.Substring(colon + 1);
+                            bool warnRunningInXEngine = false;
+                            string restOfFirstLine = firstline.Substring(colon + 1);
 
                             // FIXME: These are hardcoded because they are currently hardcoded in Compiler.cs
-                            if (restOfScript.StartsWith("c#")
-                                || restOfScript.StartsWith("vb")
-                                || restOfScript.StartsWith("lsl")
-                                || restOfScript.StartsWith("js")
-                                || restOfScript.StartsWith("yp"))
-                                scriptExplicitlyInXEngineLanguage = true;
-
-                            if (scriptExplicitlyInXEngineLanguage)
+                            if (restOfFirstLine.StartsWith("c#")
+                                || restOfFirstLine.StartsWith("vb")
+                                || restOfFirstLine.StartsWith("lsl")
+                                || restOfFirstLine.StartsWith("js")
+                                || restOfFirstLine.StartsWith("yp")
+                                || restOfFirstLine.Length == 0)
+                                warnRunningInXEngine = true;
+
+                            if (warnRunningInXEngine)
                             {
                                 SceneObjectPart part =
                                         m_Scene.GetSceneObjectPart(