diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index b58e7c4762..cb12d65c0a 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -4416,10 +4416,27 @@ namespace OpenSim.Region.Framework.Scenes
 
             // Check that the auth_token is valid
             AgentCircuitData acd = AuthenticateHandler.GetAgentCircuitData(agentID);
-            if (acd != null && acd.SessionID.ToString() == auth_token)
+
+            if (acd == null)
+            {
+                m_log.DebugFormat(
+                    "[SCENE]: Request to close agent {0} but no such agent in scene {1}.  May have been closed previously.", 
+                    agentID, Name);
+
+                return false;
+            }
+
+            if (acd.SessionID.ToString() == auth_token)
+            {
                 return IncomingCloseAgent(agentID, force);
+            }
             else
-                m_log.ErrorFormat("[SCENE]: Request to close agent {0} with invalid authorization token {1}", agentID, auth_token);
+            {
+                m_log.WarnFormat(
+                    "[SCENE]: Request to close agent {0} with invalid authorization token {1} in {2}", 
+                    agentID, auth_token, Name);
+            }
+
             return false;
         }