diff --git a/OpenSim/Framework/GridInstantMessage.cs b/OpenSim/Framework/GridInstantMessage.cs
index 53d98db236..6954c64e20 100644
--- a/OpenSim/Framework/GridInstantMessage.cs
+++ b/OpenSim/Framework/GridInstantMessage.cs
@@ -47,7 +47,6 @@ namespace OpenSim.Framework
         public uint ParentEstateID;
         public Guid RegionID;
         public uint timestamp;
-        public Guid ID;
 
         public GridInstantMessage()
         {
@@ -68,8 +67,7 @@ namespace OpenSim.Framework
             binaryBucket = im.binaryBucket;
             RegionID = im.RegionID;
             ParentEstateID = im.ParentEstateID;
-            ID = im.ID;
-
+ 
             if (addTimestamp)
                 timestamp = (uint)Util.UnixTimeSinceEpoch();
         }
@@ -78,7 +76,7 @@ namespace OpenSim.Framework
                 string _fromAgentName, UUID _toAgentID,
                 byte _dialog, bool _fromGroup, string _message,
                 UUID _imSessionID, bool _offline, Vector3 _position,
-                byte[] _binaryBucket, UUID _ID, bool addTimestamp)
+                byte[] _binaryBucket, bool addTimestamp)
         {
             fromAgentID = _fromAgentID.Guid;
             fromAgentName = _fromAgentName;
@@ -87,7 +85,6 @@ namespace OpenSim.Framework
             fromGroup = _fromGroup;
             message = _message;
             imSessionID = _imSessionID.Guid;
-            ID = _ID.Guid;
 
             if (_offline)
                 offline = 1;
@@ -106,22 +103,12 @@ namespace OpenSim.Framework
                 timestamp = (uint)Util.UnixTimeSinceEpoch();
         }
 
-        public GridInstantMessage(IScene scene, UUID _fromAgentID,
-                string _fromAgentName, UUID _toAgentID,
-                byte _dialog, bool _fromGroup, string _message,
-                UUID _imSessionID, bool _offline, Vector3 _position,
-                byte[] _binaryBucket, bool addTimestamp) : this (scene, _fromAgentID,
-                    _fromAgentName, _toAgentID, _dialog, _fromGroup, _message,
-                    _imSessionID, _offline, _position, _binaryBucket, UUID.Zero, addTimestamp)
-        {
-        }
-
         public GridInstantMessage(IScene scene, UUID _fromAgentID,
                 string _fromAgentName, UUID _toAgentID, byte _dialog,
                 string _message, bool _offline,
                 Vector3 _position) : this(scene, _fromAgentID, _fromAgentName,
                 _toAgentID, _dialog, false, _message,
-                _fromAgentID ^ _toAgentID, _offline, _position, new byte[0], UUID.Zero, true)
+                _fromAgentID ^ _toAgentID, _offline, _position, new byte[0], true)
         {
         }
     }
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
index 0bb5dc68ea..26fc85e7fe 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
@@ -961,11 +961,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     = (ImprovedInstantMessagePacket)PacketPool.Instance.GetPacket(PacketType.ImprovedInstantMessage);
 
                 msg.AgentData.AgentID = new UUID(im.fromAgentID);
-                msg.AgentData.SessionID = new UUID(im.imSessionID);
+                msg.AgentData.SessionID = UUID.Zero;
                 msg.MessageBlock.FromAgentName = Util.StringToBytes256(im.fromAgentName);
                 msg.MessageBlock.Dialog = im.dialog;
                 msg.MessageBlock.FromGroup = im.fromGroup;
-                msg.MessageBlock.ID = new UUID(im.ID);
+                // this is odd
+                if (im.imSessionID == UUID.Zero.Guid)
+                    msg.MessageBlock.ID = new UUID(im.fromAgentID) ^ new UUID(im.toAgentID);
+                else
+                    msg.MessageBlock.ID = new UUID(im.imSessionID);                
                 msg.MessageBlock.Offline = im.offline;
                 msg.MessageBlock.ParentEstateID = im.ParentEstateID;
                 msg.MessageBlock.Position = im.Position;
diff --git a/OpenSim/Region/CoreModules/Avatar/InstantMessage/MessageTransferModule.cs b/OpenSim/Region/CoreModules/Avatar/InstantMessage/MessageTransferModule.cs
index 1366103328..6b120fb1a9 100644
--- a/OpenSim/Region/CoreModules/Avatar/InstantMessage/MessageTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/InstantMessage/MessageTransferModule.cs
@@ -216,7 +216,6 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
                 UUID fromAgentID = UUID.Zero;
                 UUID toAgentID = UUID.Zero;
                 UUID imSessionID = UUID.Zero;
-                UUID imID = UUID.Zero;
                 uint timestamp = 0;
                 string fromAgentName = "";
                 string message = "";
@@ -263,7 +262,6 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
                     UUID.TryParse((string)requestData["to_agent_id"], out toAgentID);
                     UUID.TryParse((string)requestData["im_session_id"], out imSessionID);
                     UUID.TryParse((string)requestData["region_id"], out RegionID);
-                    UUID.TryParse((string)requestData["id"], out imID);
 
                     try
                     {
@@ -391,8 +389,6 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
                     gim.ParentEstateID = ParentEstateID;
                     gim.Position = Position;
                     gim.binaryBucket = binaryBucket;
-                    gim.ID = imID.Guid;
-
 
                     // Trigger the Instant message in the scene.
                     foreach (Scene scene in m_Scenes)
@@ -702,8 +698,6 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
             gim["from_agent_session"] = UUID.Zero.ToString();
             gim["to_agent_id"] = msg.toAgentID.ToString();
             gim["im_session_id"] = msg.imSessionID.ToString();
-            if(msg.ID != Guid.Empty)
-                gim["id"] = msg.ID.ToString();
             gim["timestamp"] = msg.timestamp.ToString();
             gim["from_agent_name"] = msg.fromAgentName;
             gim["message"] = msg.message;