diff --git a/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs b/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs
index 900b19ce2f..2c6ab2ee6b 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs
@@ -376,6 +376,17 @@ namespace OpenSim.Region.Framework.Scenes
 
             SceneObjectPart part = GetSceneObjectPart(primID);
             SceneObjectGroup group = part.ParentGroup;
+
+            if (null == group)
+            {
+                m_log.ErrorFormat(
+                    "[PRIM INVENTORY]: " +
+                    "Prim inventory update requested for item ID {0} in prim ID {1} but this prim does not exist",
+                    itemID, primID);
+
+                return new ArrayList();
+            }
+
             if (isScriptRunning)
             {
                 m_log.Debug("To RemoveScriptInstance");
@@ -385,6 +396,16 @@ namespace OpenSim.Region.Framework.Scenes
             // Retrieve item
             TaskInventoryItem item = group.GetInventoryItem(part.LocalId, itemID);
 
+            if (null == item)
+            {
+                m_log.ErrorFormat(
+                    "[PRIM INVENTORY]: Tried to retrieve item ID {0} from prim {1}, {2} for caps script update "
+                        + " but the item does not exist in this inventory",
+                    itemID, part.Name, part.UUID);
+
+                return new ArrayList();
+            }
+
             // Update item with new asset
             item.AssetID = newAssetID;
             group.UpdateInventoryItem(item);
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs
index 7a0cc5a8fe..d3d2d73979 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs
@@ -539,6 +539,9 @@ namespace OpenSim.Region.Framework.Scenes
             //m_inventorySerial += 2;
             HasInventoryChanged = true;
             m_part.ParentGroup.HasGroupChanged = true;
+
+            //SYMMETRIC SYNC: add ScheduleFullUpdate to enable synchronization across actors
+            m_part.ScheduleFullUpdate();
         }
 
         /// <summary>