diff --git a/OpenSim/Data/MySQL/MySQLRegionData.cs b/OpenSim/Data/MySQL/MySQLRegionData.cs
index 9c2ee4ae09..4a16a702c4 100644
--- a/OpenSim/Data/MySQL/MySQLRegionData.cs
+++ b/OpenSim/Data/MySQL/MySQLRegionData.cs
@@ -412,8 +412,8 @@ namespace OpenSim.Data.MySQL
         public List<SceneObjectGroup> LoadObjects(UUID regionUUID)
         {
             UUID lastGroupID = UUID.Zero;
-            List<SceneObjectGroup> objects = new List<SceneObjectGroup>();
-            List<SceneObjectPart> prims = new List<SceneObjectPart>();
+            Dictionary<UUID, SceneObjectGroup> objects = new Dictionary<UUID, SceneObjectGroup>();
+            Dictionary<UUID, SceneObjectPart> prims = new Dictionary<UUID, SceneObjectPart>();
             SceneObjectGroup grp = null;
 
             lock (m_Connection)
@@ -441,14 +441,14 @@ namespace OpenSim.Data.MySQL
                         else
                             prim.Shape = BuildShape(reader);
 
-                        prims.Add(prim);
+                        prims[prim.UUID] = prim;
 
                         UUID groupID = new UUID(reader["SceneGroupID"].ToString());
 
                         if (groupID != lastGroupID) // New SOG
                         {
                             if (grp != null)
-                                objects.Add(grp);
+                                objects[grp.UUID] = grp;
 
                             lastGroupID = groupID;
                             
@@ -487,16 +487,47 @@ namespace OpenSim.Data.MySQL
                 }
 
                 if (grp != null)
-                    objects.Add(grp);
+                    objects[grp.UUID] = grp;
                 cmd.Dispose();
             }
 
-            foreach (SceneObjectPart part in prims)
-                LoadItems(part);
+            // Instead of attempting to LoadItems on every prim,
+            // most of which probably have no items... get a 
+            // list from DB of all prims which have items and
+            // LoadItems only on those
+            List<SceneObjectPart> primsWithInventory = new List<SceneObjectPart>();
+            lock (m_Connection)
+            {
+                MySqlCommand itemCmd = m_Connection.CreateCommand();
+                itemCmd.CommandText = "select distinct primID from primitems";
+                IDataReader itemReader = ExecuteReader(itemCmd);
+                try
+                {
+                    while (itemReader.Read())
+                    {
+                        if (!(itemReader["primID"] is DBNull))
+                        {
+                            UUID primID = new UUID(itemReader["primID"].ToString());
+                            if (prims.ContainsKey(primID))
+                            {
+                                primsWithInventory.Add(prims[primID]);
+                            }
+                        }
+                    }
+                }
+                finally
+                {
+                    itemReader.Close();
+                }
+                itemCmd.Dispose();
+            }
 
+            foreach (SceneObjectPart prim in primsWithInventory)
+            {
+                LoadItems(prim);
+            }
             m_log.DebugFormat("[REGION DB]: Loaded {0} objects using {1} prims", objects.Count, prims.Count);
-
-            return objects;
+            return new List<SceneObjectGroup>(objects.Values);
         }
 
         /// <summary>
diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 33afc40dc2..ec209ed3c9 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -998,7 +998,7 @@ namespace OpenSim.Region.Framework.Scenes
                     physicsMS2 = Environment.TickCount - physicsMS2;
 
                     if (m_frame % m_update_entitymovement == 0)
-                        m_sceneGraph.UpdateEntityMovement();
+                        m_sceneGraph.UpdateScenePresenceMovement();
 
                     physicsMS = Environment.TickCount;
                     if ((m_frame % m_update_physics == 0) && m_physics_enabled)
diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index 3007598829..48dea0719a 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -198,9 +198,9 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
-        protected internal void UpdateEntityMovement()
+        protected internal void UpdateScenePresenceMovement()
         {
-            List<EntityBase> moveEntities = GetEntities();
+            List<ScenePresence> moveEntities = GetScenePresences();
 
             foreach (EntityBase entity in moveEntities)
             {
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index d72ed7dadf..5be074e9d1 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -1904,7 +1904,7 @@ namespace OpenSim.Region.Framework.Scenes
                     //return;
                 //}
 
-                if (Util.DistanceLessThan(lastPhysGroupPos, AbsolutePosition, 0.02) && UsePhysics)
+                if (UsePhysics && Util.DistanceLessThan(lastPhysGroupPos, AbsolutePosition, 0.02))
                 {
                     m_rootPart.UpdateFlag = 1;
                     lastPhysGroupPos = AbsolutePosition;
@@ -1916,11 +1916,10 @@ namespace OpenSim.Region.Framework.Scenes
 
                 checkAtTargets();
 
-                if (((Math.Abs(lastPhysGroupRot.W - GroupRotation.W) > 0.1)
+                if (UsePhysics && ((Math.Abs(lastPhysGroupRot.W - GroupRotation.W) > 0.1)
                     || (Math.Abs(lastPhysGroupRot.X - GroupRotation.X) > 0.1)
                     || (Math.Abs(lastPhysGroupRot.Y - GroupRotation.Y) > 0.1)
-                    || (Math.Abs(lastPhysGroupRot.Z - GroupRotation.Z) > 0.1))
-                    && UsePhysics)
+                    || (Math.Abs(lastPhysGroupRot.Z - GroupRotation.Z) > 0.1)))
                 {
                     m_rootPart.UpdateFlag = 1;
 
diff --git a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
index 38df751c5d..dd58a4e2d0 100644
--- a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
+++ b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
@@ -223,6 +223,11 @@ namespace OpenSim.Region.Physics.OdePlugin
             set { m_localID = value; }
         }
 
+        public override int GetHashCode()
+        {
+            return (int)m_localID;
+        }
+
         public override bool Grabbed
         {
             set { return; }
diff --git a/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs b/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs
index d0f77e6f55..673ae39ff6 100644
--- a/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs
+++ b/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs
@@ -260,6 +260,11 @@ namespace OpenSim.Region.Physics.OdePlugin
                 m_localID = value; }
         }
 
+        public override int GetHashCode()
+        {
+            return (int)m_localID;
+        }
+
         public override bool Grabbed
         {
             set { return; }
diff --git a/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs b/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
index 817cc2225b..e702d5eab9 100644
--- a/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
+++ b/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
@@ -235,11 +235,11 @@ namespace OpenSim.Region.Physics.OdePlugin
         private d.NearCallback nearCallback;
         public d.TriCallback triCallback;
         public d.TriArrayCallback triArrayCallback;
-        private readonly List<OdeCharacter> _characters = new List<OdeCharacter>();
-        private readonly List<OdePrim> _prims = new List<OdePrim>();
-        private readonly List<OdePrim> _activeprims = new List<OdePrim>();
-        private readonly List<OdePrim> _taintedPrim = new List<OdePrim>();
-        private readonly List<OdeCharacter> _taintedActors = new List<OdeCharacter>();
+        private readonly HashSet<OdeCharacter> _characters = new HashSet<OdeCharacter>();
+        private readonly HashSet<OdePrim> _prims = new HashSet<OdePrim>();
+        private readonly HashSet<OdePrim> _activeprims = new HashSet<OdePrim>();
+        private readonly HashSet<OdePrim> _taintedPrim = new HashSet<OdePrim>();
+        private readonly HashSet<OdeCharacter> _taintedActors = new HashSet<OdeCharacter>();
         private readonly List<d.ContactGeom> _perloopContact = new List<d.ContactGeom>();
         private readonly List<PhysicsActor> _collisionEventPrim = new List<PhysicsActor>();
         public Dictionary<IntPtr, String> geom_name_map = new Dictionary<IntPtr, String>();
diff --git a/prebuild.xml b/prebuild.xml
index 343b06a166..cdffd8a099 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -501,6 +501,7 @@
 
       <ReferencePath>../../../../bin/</ReferencePath>
       <Reference name="System"/>
+      <Reference name="System.Core"/>
       <Reference name="OpenMetaverseTypes.dll"/>
       <Reference name="Nini.dll" />
       <Reference name="OpenSim.Framework"/>
@@ -3714,6 +3715,7 @@
 
       <ReferencePath>../../../../bin/</ReferencePath>
       <Reference name="System"/>
+      <Reference name="System.Core"/>
       <Reference name="OpenMetaverseTypes.dll"/>
       <Reference name="Nini.dll" />
       <Reference name="OpenSim.Framework"/>