diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLImageManager.cs b/OpenSim/Region/ClientStack/LindenUDP/LLImageManager.cs
index 2120d33d42..cc290edd99 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/LLImageManager.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/LLImageManager.cs
@@ -88,7 +88,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 J2KImage imgrequest;
 
                 // Do a linear search for this texture download
-                lock (m_priorityQueue)
+                lock (m_syncRoot)
                     m_priorityQueue.Find(delegate(J2KImage img) { return img.TextureID == newRequest.RequestedAssetID; }, out imgrequest);
 
                 if (imgrequest != null)
@@ -99,7 +99,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
                         try 
                         {
-                            lock (m_priorityQueue)
+                            lock (m_syncRoot)
                                 m_priorityQueue.Delete(imgrequest.PriorityQueueHandle); 
                         }
                         catch (Exception) { }
@@ -211,7 +211,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         {
             J2KImage image = null;
 
-            lock (m_priorityQueue)
+            lock (m_syncRoot)
             {
 
                 if (m_priorityQueue.Count > 0)
@@ -230,23 +230,27 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         {
             image.PriorityQueueHandle = null;
 
-            lock (m_priorityQueue)
-                m_priorityQueue.Add(ref image.PriorityQueueHandle, image);
+            lock (m_syncRoot)
+                try
+                {
+                    m_priorityQueue.Add(ref image.PriorityQueueHandle, image);
+                }
+                catch (Exception) { }
         }
 
         void RemoveImageFromQueue(J2KImage image)
         {
-            try
-            {
-                lock (m_priorityQueue)
+            lock (m_syncRoot)
+                try
+                {
                     m_priorityQueue.Delete(image.PriorityQueueHandle);
-            }
-            catch (Exception) { }
+                }
+                catch (Exception) { }
         }
 
         void UpdateImageInQueue(J2KImage image)
         {
-            lock (m_priorityQueue)
+            lock (m_syncRoot)
             {
                 try { m_priorityQueue.Replace(image.PriorityQueueHandle, image); }
                 catch (Exception)
diff --git a/OpenSim/Server/Base/ServerUtils.cs b/OpenSim/Server/Base/ServerUtils.cs
index 0964caaed7..9d9735e439 100644
--- a/OpenSim/Server/Base/ServerUtils.cs
+++ b/OpenSim/Server/Base/ServerUtils.cs
@@ -260,7 +260,7 @@ namespace OpenSim.Server.Base
 
         public static Dictionary<string, object> ParseXmlResponse(string data)
         {
-            //m_log.DebugFormat("[XXX]: received xml string: {0}", data);
+            m_log.DebugFormat("[XXX]: received xml string: {0}", data);
 
             Dictionary<string, object> ret = new Dictionary<string, object>();
 
diff --git a/OpenSim/Server/Handlers/Grid/GridServerPostHandler.cs b/OpenSim/Server/Handlers/Grid/GridServerPostHandler.cs
index e22328dc66..08edcbfe3b 100644
--- a/OpenSim/Server/Handlers/Grid/GridServerPostHandler.cs
+++ b/OpenSim/Server/Handlers/Grid/GridServerPostHandler.cs
@@ -137,11 +137,21 @@ namespace OpenSim.Server.Handlers.Grid
             }
 
             Dictionary<string, object> rinfoData = new Dictionary<string, object>();
-            foreach (KeyValuePair<string, string> kvp in request)
-                rinfoData[kvp.Key] = kvp.Value;
-            GridRegion rinfo = new GridRegion(rinfoData);
+            GridRegion rinfo = null;
+            try
+            {
+                foreach (KeyValuePair<string, string> kvp in request)
+                    rinfoData[kvp.Key] = kvp.Value;
+                rinfo = new GridRegion(rinfoData);
+            }
+            catch (Exception e)
+            {
+                m_log.DebugFormat("[GRID HANDLER]: exception unpacking region data: {0}", e);
+            }
 
-            bool result = m_GridService.RegisterRegion(scopeID, rinfo);
+            bool result = false;
+            if (rinfo != null)
+                result = m_GridService.RegisterRegion(scopeID, rinfo);
 
             if (result)
                 return SuccessResult();
diff --git a/OpenSim/Services/Connectors/Grid/GridServiceConnector.cs b/OpenSim/Services/Connectors/Grid/GridServiceConnector.cs
index ba46b0d71f..acdf5587de 100644
--- a/OpenSim/Services/Connectors/Grid/GridServiceConnector.cs
+++ b/OpenSim/Services/Connectors/Grid/GridServiceConnector.cs
@@ -109,8 +109,13 @@ namespace OpenSim.Services.Connectors
                 {
                     Dictionary<string, object> replyData = ServerUtils.ParseXmlResponse(reply);
 
-                    if ((replyData["Result"] != null) && (replyData["Result"].ToString().ToLower() == "success"))
+                    if (replyData.ContainsKey("Result")&& (replyData["Result"].ToString().ToLower() == "success"))
                         return true;
+                    else if (!replyData.ContainsKey("Result"))
+                        m_log.DebugFormat("[GRID CONNECTOR]: reply data does not contain result field");
+                    else
+                        m_log.DebugFormat("[GRID CONNECTOR]: unexpected result {0}", replyData["Result"].ToString());
+                    
                 }
                 else
                     m_log.DebugFormat("[GRID CONNECTOR]: RegisterRegion received null reply");