13 files changed, 112 insertions, 107 deletions

diff --git a/OpenSim/Region/ClientStack/Linden/Caps/ObjectCaps/UploadObjectAssetModule.cs b/OpenSim/Region/ClientStack/Linden/Caps/ObjectCaps/UploadObjectAssetModule.cs
index c07fc73..e4bacd4 100644
--- a/OpenSim/Region/ClientStack/Linden/Caps/ObjectCaps/UploadObjectAssetModule.cs
+++ b/OpenSim/Region/ClientStack/Linden/Caps/ObjectCaps/UploadObjectAssetModule.cs
@@ -332,7 +332,7 @@ namespace OpenSim.Region.ClientStack.Linden
                 
                 grp.IsAttachment = false;
                 // Required for linking
-                grp.RootPart.UpdateFlag = 0;
+                grp.RootPart.ClearUpdateSchedule();
                 
                 if (m_scene.Permissions.CanRezObject(1, avatar.UUID, pos))
                 {
@@ -345,8 +345,9 @@ namespace OpenSim.Region.ClientStack.Linden
 
             for (int j = 1; j < allparts.Length; j++)
             {
-                rootGroup.RootPart.UpdateFlag = 0;
-                allparts[j].RootPart.UpdateFlag = 0;
+                // Required for linking
+                rootGroup.RootPart.ClearUpdateSchedule();
+                allparts[j].RootPart.ClearUpdateSchedule();
                 rootGroup.LinkToGroup(allparts[j]);
             }
 
diff --git a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
index eff6911..d866636 100644
--- a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
@@ -169,6 +169,8 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
 
         public bool SendAppearance(UUID agentId)
         {
+//            m_log.DebugFormat("[AVFACTORY]: Sending appearance for {0}", agentId);
+
             ScenePresence sp = m_scene.GetScenePresence(agentId);
             if (sp == null)
             {
@@ -257,7 +259,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
         /// </summary>
         public void QueueAppearanceSend(UUID agentid)
         {
-            // m_log.WarnFormat("[AVFACTORY]: Queue appearance send for {0}", agentid);
+//            m_log.DebugFormat("[AVFACTORY]: Queue appearance send for {0}", agentid);
 
             // 10000 ticks per millisecond, 1000 milliseconds per second
             long timestamp = DateTime.Now.Ticks + Convert.ToInt64(m_sendtime * 1000 * 10000);
@@ -391,10 +393,17 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                 Dictionary<UUID, long> sends = new Dictionary<UUID, long>(m_sendqueue);
                 foreach (KeyValuePair<UUID, long> kvp in sends)
                 {
-                    if (kvp.Value < now)
+                    // We have to load the key and value into local parameters to avoid a race condition if we loop
+                    // around and load kvp with a different value before FireAndForget has launched its thread.
+                    UUID avatarID = kvp.Key;
+                    long sendTime = kvp.Value;
+
+//                    m_log.DebugFormat("[AVFACTORY]: Handling queued appearance updates for {0}, update delta to now is {1}", avatarID, sendTime - now);
+
+                    if (sendTime < now)
                     {
-                        Util.FireAndForget(delegate(object o) { SendAppearance(kvp.Key); });
-                        m_sendqueue.Remove(kvp.Key);
+                        Util.FireAndForget(o => SendAppearance(avatarID));
+                        m_sendqueue.Remove(avatarID);
                     }
                 }
             }
@@ -404,10 +413,15 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                 Dictionary<UUID, long> saves = new Dictionary<UUID, long>(m_savequeue);
                 foreach (KeyValuePair<UUID, long> kvp in saves)
                 {
-                    if (kvp.Value < now)
+                    // We have to load the key and value into local parameters to avoid a race condition if we loop
+                    // around and load kvp with a different value before FireAndForget has launched its thread.                    
+                    UUID avatarID = kvp.Key;
+                    long sendTime = kvp.Value;
+
+                    if (sendTime < now)
                     {
-                        Util.FireAndForget(delegate(object o) { SaveAppearance(kvp.Key); });
-                        m_savequeue.Remove(kvp.Key);
+                        Util.FireAndForget(o => SaveAppearance(avatarID));
+                        m_savequeue.Remove(avatarID);
                     }
                 }
             }
diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
index 26151bf..e47d2a7 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
@@ -1740,7 +1740,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             //m_log.Debug("  >>> CrossPrimGroupIntoNewRegion <<<");
 
             bool successYN = false;
-            grp.RootPart.UpdateFlag = 0;
+            grp.RootPart.ClearUpdateSchedule();
             //int primcrossingXMLmethod = 0;
 
             if (destination != null)
diff --git a/OpenSim/Region/CoreModules/Scripting/DynamicTexture/DynamicTextureModule.cs b/OpenSim/Region/CoreModules/Scripting/DynamicTexture/DynamicTextureModule.cs
index 6075e19..f2c8b3d 100644
--- a/OpenSim/Region/CoreModules/Scripting/DynamicTexture/DynamicTextureModule.cs
+++ b/OpenSim/Region/CoreModules/Scripting/DynamicTexture/DynamicTextureModule.cs
@@ -395,9 +395,11 @@ namespace OpenSim.Region.CoreModules.Scripting.DynamicTexture
                         {
                             result = OpenJPEG.EncodeFromImage(joint, true);
                         }
-                        catch (Exception)
+                        catch (Exception e)
                         {
-                            m_log.Error("[DYNAMICTEXTUREMODULE]: OpenJpeg Encode Failed.  Empty byte data returned!");
+                            m_log.ErrorFormat(
+                                "[DYNAMICTEXTUREMODULE]: OpenJpeg Encode Failed.  Exception {0}{1}",
+                                e.Message, e.StackTrace);
                         }
 
                         return result;
diff --git a/OpenSim/Region/CoreModules/Scripting/VectorRender/VectorRenderModule.cs b/OpenSim/Region/CoreModules/Scripting/VectorRender/VectorRenderModule.cs
index 7316e5b..c061868 100644
--- a/OpenSim/Region/CoreModules/Scripting/VectorRender/VectorRenderModule.cs
+++ b/OpenSim/Region/CoreModules/Scripting/VectorRender/VectorRenderModule.cs
@@ -338,10 +338,11 @@ namespace OpenSim.Region.CoreModules.Scripting.VectorRender
             {
                 imageJ2000 = OpenJPEG.EncodeFromImage(bitmap, true);
             }
-            catch (Exception)
+            catch (Exception e)
             {
-                m_log.Error(
-                    "[VECTORRENDERMODULE]: OpenJpeg Encode Failed.  Empty byte data returned!");
+                m_log.ErrorFormat(
+                    "[VECTORRENDERMODULE]: OpenJpeg Encode Failed.  Exception {0}{1}",
+                    e.Message, e.StackTrace);
             }
 
             m_textureManager.ReturnData(id, imageJ2000);
diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index a6178e7..bcbd966 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -1901,8 +1901,8 @@ namespace OpenSim.Region.Framework.Scenes
                         SceneObjectPart newRoot = newSet[0];
                         newSet.RemoveAt(0);
 
-                        foreach (SceneObjectPart newChild in newSet)
-                            newChild.UpdateFlag = 0;
+                            foreach (SceneObjectPart newChild in newSet)
+                                newChild.ClearUpdateSchedule();
 
                         newRoot.ParentGroup.areUpdatesSuspended = true;
                         LinkObjects(newRoot, newSet);
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 8b71f5b..6d906b7 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -1479,8 +1479,8 @@ namespace OpenSim.Region.Framework.Scenes
                         avatar.StandUp();
 
                     if (!silent)
-                                        {
-                        part.UpdateFlag = 0;
+                    {
+                        part.ClearUpdateSchedule();
                         if (part == m_rootPart)
                         {
                             if (!IsAttachment || (AttachedAvatar == avatar.ControllingClient.AgentId) || 
@@ -2123,13 +2123,13 @@ namespace OpenSim.Region.Framework.Scenes
 
             if (UsePhysics && !AbsolutePosition.ApproxEquals(lastPhysGroupPos, 0.02f))
             {
-                m_rootPart.UpdateFlag = 1;
+                m_rootPart.UpdateFlag = UpdateRequired.TERSE;
                 lastPhysGroupPos = AbsolutePosition;
             }
 
             if (UsePhysics && !GroupRotation.ApproxEquals(lastPhysGroupRot, 0.1f))
             {
-                m_rootPart.UpdateFlag = 1;
+                m_rootPart.UpdateFlag = UpdateRequired.TERSE;
                 lastPhysGroupRot = GroupRotation;
             }
 
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index a2e13ce..948518a 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -107,6 +107,13 @@ namespace OpenSim.Region.Framework.Scenes
         SCULPT = 7
     }
 
+    public enum UpdateRequired : byte
+    {
+        NONE = 0,
+        TERSE = 1,
+        FULL = 2
+    }
+
     #endregion Enumerations
 
     public class SceneObjectPart : IScriptHost, ISceneEntity
@@ -265,15 +272,7 @@ namespace OpenSim.Region.Framework.Scenes
 
         private bool m_passTouches;
 
-        /// <summary>
-        /// Only used internally to schedule client updates.
-        /// 0 - no update is scheduled
-        /// 1 - terse update scheduled
-        /// 2 - full update scheduled
-        ///
-        /// TODO - This should be an enumeration
-        /// </summary>
-        private byte m_updateFlag;
+        private UpdateRequired m_updateFlag;
 
         private PhysicsActor m_physActor;
         protected Vector3 m_acceleration;
@@ -908,7 +907,15 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
-        /// <summary></summary>
+        /// <summary>Update angular velocity and schedule terse update.</summary>
+        public void UpdateAngularVelocity(Vector3 avel)
+        {
+            AngularVelocity = avel;
+            ScheduleTerseUpdate();
+            ParentGroup.HasGroupChanged = true;
+        }
+
+        /// <summary>Get or set angular velocity. Does not schedule update.</summary>
         public Vector3 AngularVelocity
         {
             get
@@ -1056,8 +1063,8 @@ namespace OpenSim.Region.Framework.Scenes
                 TriggerScriptChangedEvent(Changed.SCALE);
             }
         }
-        
-        public byte UpdateFlag
+
+        public UpdateRequired UpdateFlag
         {
             get { return m_updateFlag; }
             set { m_updateFlag = value; }
@@ -1362,9 +1369,9 @@ namespace OpenSim.Region.Framework.Scenes
         /// <summary>
         /// Clear all pending updates of parts to clients
         /// </summary>
-        private void ClearUpdateSchedule()
+        public void ClearUpdateSchedule()
         {
-            m_updateFlag = 0;
+            UpdateFlag = UpdateRequired.NONE;
         }
 
         /// <summary>
@@ -2884,7 +2891,7 @@ namespace OpenSim.Region.Framework.Scenes
                 TimeStampFull = (uint)timeNow;
             }
 
-            m_updateFlag = 2;
+            UpdateFlag = UpdateRequired.FULL;
 
             //            m_log.DebugFormat(
             //                "[SCENE OBJECT PART]: Scheduling full  update for {0}, {1} at {2}",
@@ -2900,13 +2907,13 @@ namespace OpenSim.Region.Framework.Scenes
             if (m_parentGroup == null)
                 return;
 
-            if (m_updateFlag < 1)
+            if (UpdateFlag == UpdateRequired.NONE)
             {
                 m_parentGroup.HasGroupChanged = true;
                 m_parentGroup.QueueForUpdateCheck();
 
                 TimeStampTerse = (uint) Util.UnixTimeSinceEpoch();
-                m_updateFlag = 1;
+                UpdateFlag = UpdateRequired.TERSE;
 
             //                m_log.DebugFormat(
             //                    "[SCENE OBJECT PART]: Scheduling terse update for {0}, {1} at {2}",
@@ -3073,48 +3080,40 @@ namespace OpenSim.Region.Framework.Scenes
             const float POSITION_TOLERANCE = 0.05f; // I don't like this, but I suppose it's necessary
             const int TIME_MS_TOLERANCE = 200; //llSetPos has a 200ms delay. This should NOT be 3 seconds.
 
-            if (m_updateFlag == 1)
+            switch (UpdateFlag)
             {
-                // Throw away duplicate or insignificant updates
-                if (!RotationOffset.ApproxEquals(m_lastRotation, ROTATION_TOLERANCE) ||
-                    !Acceleration.Equals(m_lastAcceleration) ||
-                    !Velocity.ApproxEquals(m_lastVelocity, VELOCITY_TOLERANCE) ||
-                    Velocity.ApproxEquals(Vector3.Zero, VELOCITY_TOLERANCE) ||
-                    !AngularVelocity.ApproxEquals(m_lastAngularVelocity, VELOCITY_TOLERANCE) ||
-                    !OffsetPosition.ApproxEquals(m_lastPosition, POSITION_TOLERANCE) ||
-                    Environment.TickCount - m_lastTerseSent > TIME_MS_TOLERANCE)
+                case UpdateRequired.TERSE:
                 {
-                    AddTerseUpdateToAllAvatars();
-                    
-
-                    // This causes the Scene to 'poll' physical objects every couple of frames
-                    // bad, so it's been replaced by an event driven method.
-                    //if ((ObjectFlags & (uint)PrimFlags.Physics) != 0)
-                    //{
-                    // Only send the constant terse updates on physical objects!
-                    //ScheduleTerseUpdate();
-                    //}
-
-                    // Update the "last" values
-                    m_lastPosition = OffsetPosition;
-                    m_lastRotation = RotationOffset;
-                    m_lastVelocity = Velocity;
-                    m_lastAcceleration = Acceleration;
-                    m_lastAngularVelocity = AngularVelocity;
-                    m_lastTerseSent = Environment.TickCount;
+                    // Throw away duplicate or insignificant updates
+                    if (!RotationOffset.ApproxEquals(m_lastRotation, ROTATION_TOLERANCE) ||
+                        !Acceleration.Equals(m_lastAcceleration) ||
+                        !Velocity.ApproxEquals(m_lastVelocity, VELOCITY_TOLERANCE) ||
+                        Velocity.ApproxEquals(Vector3.Zero, VELOCITY_TOLERANCE) ||
+                        !AngularVelocity.ApproxEquals(m_lastAngularVelocity, VELOCITY_TOLERANCE) ||
+                        !OffsetPosition.ApproxEquals(m_lastPosition, POSITION_TOLERANCE) ||
+                        Environment.TickCount - m_lastTerseSent > TIME_MS_TOLERANCE)
+                    {
+                        AddTerseUpdateToAllAvatars();
+                        ClearUpdateSchedule();
+
+                        // Update the "last" values
+                        m_lastPosition = OffsetPosition;
+                        m_lastRotation = RotationOffset;
+                        m_lastVelocity = Velocity;
+                        m_lastAcceleration = Acceleration;
+                        m_lastAngularVelocity = AngularVelocity;
+                        m_lastTerseSent = Environment.TickCount;
+                    }
+                    break;
                 }
-                //Moved this outside of the if clause so updates don't get blocked.. *sigh*
-                m_updateFlag = 0; //Why were we calling a function to do this? Inefficient! *screams* 
-            }
-            else
-            {
-                if (m_updateFlag == 2) // is a new prim, just created/reloaded or has major changes
+                case UpdateRequired.FULL:
                 {
                     AddFullUpdateToAllAvatars();
-                    m_updateFlag = 0; //Same here
+                    break;
                 }
             }
-            m_updateFlag = 0;
+
+            ClearUpdateSchedule();
         }
 
         /// <summary>
@@ -3492,7 +3491,7 @@ namespace OpenSim.Region.Framework.Scenes
             _groupID = groupID;
             if (client != null)
                 SendPropertiesToClient(client);
-            m_updateFlag = 2;
+            UpdateFlag = UpdateRequired.FULL;
         }
 
         /// <summary>
@@ -4699,7 +4698,7 @@ namespace OpenSim.Region.Framework.Scenes
         {
             m_shape.TextureEntry = textureEntry;
             TriggerScriptChangedEvent(Changed.TEXTURE);
-            m_updateFlag = 1;
+            UpdateFlag = UpdateRequired.FULL;
             ParentGroup.HasGroupChanged = true;
 
             //This is madness..
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index bba746f..aa1c15e 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -2980,7 +2980,8 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public void SendAppearanceToAllOtherAgents()
         {
-            //m_log.DebugFormat("[SCENE PRESENCE] SendAppearanceToAllOtherAgents: {0} ({1})", Name, UUID);
+//            m_log.DebugFormat("[SCENE PRESENCE] SendAppearanceToAllOtherAgents: {0} {1}", Name, UUID);
+
             // only send update from root agents to other clients; children are only "listening posts"
             if (IsChildAgent)
             {
@@ -3008,7 +3009,7 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public void SendOtherAgentsAppearanceToMe()
         {
-            //m_log.DebugFormat("[SCENE PRESENCE] SendOtherAgentsAppearanceToMe: {0} ({1})", Name, UUID);
+//            m_log.DebugFormat("[SCENE PRESENCE] SendOtherAgentsAppearanceToMe: {0} {1}", Name, UUID);
 
             int count = 0;
             m_scene.ForEachRootScenePresence(delegate(ScenePresence scenePresence)
@@ -3564,7 +3565,7 @@ namespace OpenSim.Region.Framework.Scenes
                 foreach (ISceneObject so in cAgent.AttachmentObjects)
                 {
                     ((SceneObjectGroup)so).LocalId = 0;
-                    ((SceneObjectGroup)so).RootPart.UpdateFlag = 0;
+                    ((SceneObjectGroup)so).RootPart.ClearUpdateSchedule();
                     so.SetState(cAgent.AttachmentObjectStates[i++], m_scene);
                     m_scene.IncomingCreateObject(so);
                 }
diff --git a/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs b/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs
index 11dad6c..680a6fa 100644
--- a/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs
+++ b/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs
@@ -316,7 +316,6 @@ namespace OpenSim.Region.Framework.Scenes.Serialization
             m_SOPXmlProcessors.Add("ClickAction", ProcessClickAction);
             m_SOPXmlProcessors.Add("Shape", ProcessShape);
             m_SOPXmlProcessors.Add("Scale", ProcessScale);
-            m_SOPXmlProcessors.Add("UpdateFlag", ProcessUpdateFlag);
             m_SOPXmlProcessors.Add("SitTargetOrientation", ProcessSitTargetOrientation);
             m_SOPXmlProcessors.Add("SitTargetPosition", ProcessSitTargetPosition);
             m_SOPXmlProcessors.Add("SitTargetPositionLL", ProcessSitTargetPositionLL);
@@ -586,11 +585,6 @@ namespace OpenSim.Region.Framework.Scenes.Serialization
             obj.Scale = Util.ReadVector(reader, "Scale");
         }
 
-        private static void ProcessUpdateFlag(SceneObjectPart obj, XmlTextReader reader)
-        {
-            obj.UpdateFlag = (byte)reader.ReadElementContentAsInt("UpdateFlag", String.Empty);
-        }
-
         private static void ProcessSitTargetOrientation(SceneObjectPart obj, XmlTextReader reader)
         {
             obj.SitTargetOrientation = Util.ReadQuaternion(reader, "SitTargetOrientation");
@@ -1194,7 +1188,6 @@ namespace OpenSim.Region.Framework.Scenes.Serialization
             WriteShape(writer, sop.Shape, options);
 
             WriteVector(writer, "Scale", sop.Scale);
-            writer.WriteElementString("UpdateFlag", sop.UpdateFlag.ToString());
             WriteQuaternion(writer, "SitTargetOrientation", sop.SitTargetOrientation); 
             WriteVector(writer, "SitTargetPosition", sop.SitTargetPosition);
             WriteVector(writer, "SitTargetPositionLL", sop.SitTargetPositionLL);
diff --git a/OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkingTests.cs b/OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkingTests.cs
index 90cdd7b..a2332bb 100644
--- a/OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkingTests.cs
+++ b/OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkingTests.cs
@@ -70,8 +70,8 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             grp2.UpdateGroupRotationR(Quaternion.CreateFromEulers(180 * Utils.DEG_TO_RAD, 0, 0));
             
             // Required for linking
-            grp1.RootPart.UpdateFlag = 0;
-            grp2.RootPart.UpdateFlag = 0;
+            grp1.RootPart.ClearUpdateSchedule();
+            grp2.RootPart.ClearUpdateSchedule();
 
             // Link grp2 to grp1.   part2 becomes child prim to grp1. grp2 is eliminated.
             grp1.LinkToGroup(grp2);
@@ -164,10 +164,10 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             grp4.UpdateGroupRotationR(Quaternion.CreateFromEulers(0, 90 * Utils.DEG_TO_RAD, 0));
 
             // Required for linking
-            grp1.RootPart.UpdateFlag = 0;
-            grp2.RootPart.UpdateFlag = 0;
-            grp3.RootPart.UpdateFlag = 0;
-            grp4.RootPart.UpdateFlag = 0;
+            grp1.RootPart.ClearUpdateSchedule();
+            grp2.RootPart.ClearUpdateSchedule();
+            grp3.RootPart.ClearUpdateSchedule();
+            grp4.RootPart.ClearUpdateSchedule();
 
             // Link grp2 to grp1.   part2 becomes child prim to grp1. grp2 is eliminated.
             grp1.LinkToGroup(grp2);
@@ -198,8 +198,8 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             }
 
             // Required for linking
-            grp1.RootPart.UpdateFlag = 0;
-            grp3.RootPart.UpdateFlag = 0;
+            grp1.RootPart.ClearUpdateSchedule();
+            grp3.RootPart.ClearUpdateSchedule();
 
             // root part should have no offset position or rotation
             Assert.That(part1.OffsetPosition == Vector3.Zero && part1.RotationOffset == Quaternion.Identity,
diff --git a/OpenSim/Region/Framework/Scenes/UndoState.cs b/OpenSim/Region/Framework/Scenes/UndoState.cs
index 0a30f4b..5ed3c79 100644
--- a/OpenSim/Region/Framework/Scenes/UndoState.cs
+++ b/OpenSim/Region/Framework/Scenes/UndoState.cs
@@ -173,6 +173,7 @@ namespace OpenSim.Region.Framework.Scenes
             }
             else
             {
+                // Note: Updating these properties on sop automatically schedules an update if needed
                 if (Position != Vector3.Zero)
                 {
                     //                        m_log.DebugFormat(
@@ -196,8 +197,6 @@ namespace OpenSim.Region.Framework.Scenes
 
                     part.Resize(Scale);
                 }
-
-                part.ScheduleTerseUpdate();
             }
 
             part.Undoing = false;
@@ -227,6 +226,7 @@ namespace OpenSim.Region.Framework.Scenes
             }
             else
             {
+                // Note: Updating these properties on sop automatically schedules an update if needed
                 if (Position != Vector3.Zero)
                     part.OffsetPosition = Position;
 
@@ -235,8 +235,6 @@ namespace OpenSim.Region.Framework.Scenes
 
                 if (Scale != Vector3.Zero)
                     part.Resize(Scale);
-
-                part.ScheduleTerseUpdate();
             }
 
             part.Undoing = false;
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 652fa7e..45a5f9a 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -3653,10 +3653,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
         protected void TargetOmega(SceneObjectPart part, LSL_Vector axis, double spinrate, double gain)
         {
-            part.AngularVelocity = new Vector3((float)(axis.x * spinrate), (float)(axis.y * spinrate), (float)(axis.z * spinrate));
-            part.ScheduleTerseUpdate();
-            part.SendTerseUpdateToAllClients();
-            part.ParentGroup.HasGroupChanged = true;
+            part.UpdateAngularVelocity(new Vector3((float)(axis.x * spinrate), (float)(axis.y * spinrate), (float)(axis.z * spinrate)));
          }
 
         public LSL_Integer llGetStartParameter()
@@ -3958,11 +3955,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                     parentPrim = targetPart.ParentGroup;
                     childPrim = m_host.ParentGroup;
                 }
-//                byte uf = childPrim.RootPart.UpdateFlag;
-                childPrim.RootPart.UpdateFlag = 0;
+
+                // Required for linking
+                childPrim.RootPart.ClearUpdateSchedule();
                 parentPrim.LinkToGroup(childPrim);
-//                if (uf != (Byte)0)
-//                    parent.RootPart.UpdateFlag = uf;
             }
 
             parentPrim.TriggerScriptChangedEvent(Changed.LINK);
@@ -4059,7 +4055,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                         parts[0].ParentGroup.areUpdatesSuspended = true;
                         foreach (SceneObjectPart part in parts)
                         {
-                            part.UpdateFlag = 0;
+                            part.ClearUpdateSchedule();
                             newRoot.ParentGroup.LinkToGroup(part.ParentGroup);
                         }
                     }