diff --git a/OpenSim/Region/Environment/Scenes/SceneEvents.cs b/OpenSim/Region/Environment/Scenes/SceneEvents.cs
index 0986654092..e058745450 100644
--- a/OpenSim/Region/Environment/Scenes/SceneEvents.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneEvents.cs
@@ -88,7 +88,7 @@ namespace OpenSim.Region.Environment.Scenes
 
         public event RemoveScript OnRemoveScript;
 
-        public delegate void SceneGroupMoved(LLUUID groupID, LLVector3 delta);
+        public delegate bool SceneGroupMoved(LLUUID groupID, LLVector3 delta);
 
         public event SceneGroupMoved OnSceneGroupMove;
 
@@ -194,12 +194,13 @@ namespace OpenSim.Region.Environment.Scenes
             }
         }
 
-        public void TriggerGroupMove(LLUUID groupID, LLVector3 delta)
+        public bool TriggerGroupMove(LLUUID groupID, LLVector3 delta)
         {
             if (OnSceneGroupMove != null)
             {
-                OnSceneGroupMove(groupID, delta);
+               return OnSceneGroupMove(groupID, delta);
             }
+            return true;
         }
 
         public void TriggerGroupGrab(LLUUID groupID, LLVector3 offset, LLUUID userID)
diff --git a/OpenSim/Region/Environment/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Environment/Scenes/SceneObjectGroup.cs
index 1b55a49024..8038a837ea 100644
--- a/OpenSim/Region/Environment/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneObjectGroup.cs
@@ -972,9 +972,11 @@ namespace OpenSim.Region.Environment.Scenes
         /// <param name="remoteClient"></param>
         public void GrabMovement(LLVector3 offset, LLVector3 pos, IClientAPI remoteClient)
         {
-            AbsolutePosition = pos;
-            m_rootPart.SendTerseUpdateToAllClients();
-            m_scene.EventManager.TriggerGroupMove(UUID, pos);
+            if (m_scene.EventManager.TriggerGroupMove(UUID, pos))
+            {
+                AbsolutePosition = pos;
+                m_rootPart.SendTerseUpdateToAllClients();
+            } 
         }
 
         /// <summary>
@@ -1263,10 +1265,11 @@ namespace OpenSim.Region.Environment.Scenes
         /// <param name="pos"></param>
         public void UpdateGroupPosition(LLVector3 pos)
         {
-            AbsolutePosition = pos;
-            ScheduleGroupForTerseUpdate();
-
-            m_scene.EventManager.TriggerGroupMove(UUID, pos);
+            if (m_scene.EventManager.TriggerGroupMove(UUID, pos))
+            {
+                AbsolutePosition = pos;
+                ScheduleGroupForTerseUpdate();
+            }
         }
 
         /// <summary>