* It turns out that Mono doesn't currently support setting the Certificate validation handler, however, it throws a NotImplemented exception.

* Added Try/Catch/Message

OpenSim/Framework/Servers/BaseHttpServer.cs

@@ -559,7 +559,8 @@ namespace OpenSim.Framework.Servers
 
             foreach (string pattern in m_llsdHandlers.Keys)
             {
-                if (searchquery.StartsWith(searchquery))
+                
+                if (pattern.StartsWith(searchquery) && searchquery.Length >= pattern.Length)
                 {
                     if (String.IsNullOrEmpty(bestMatch) || searchquery.Length > bestMatch.Length)
                     {
@@ -568,6 +569,10 @@ namespace OpenSim.Framework.Servers
                 }
             }
 
+            // extra kicker to remove the default XMLRPC login case..  just in case..  
+            if (path == "/")
+                return false;
+
             if (String.IsNullOrEmpty(bestMatch))
             {
                 

OpenSim/Region/Environment/Modules/InterGrid/OpenGridProtocolModule.cs

@@ -114,8 +114,15 @@ namespace OpenSim.Region.Environment.Modules.InterGrid
                         if (m_scene.Count == 0)
                         {
                             scene.AddLLSDHandler("/agent/", ProcessAgentDomainMessage);
+                            try
+                            {
                                 ServicePointManager.ServerCertificateValidationCallback += customXertificateValidation;
                             }
+                            catch (NotImplementedException)
+                            {
+                                m_log.Error("[OGP]: Certificate validation handler change not supported.  You may get ssl certificate validation errors teleporting from your region to some SSL regions.");
+                            }
+                        }
 
                         if (!m_scene.Contains(scene))
                             m_scene.Add(scene);