Index: includes/xmlrpcs.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/xmlrpcs.inc,v
retrieving revision 1.24.2.1
diff -u -r1.24.2.1 xmlrpcs.inc
--- includes/xmlrpcs.inc	28 Apr 2008 10:04:52 -0000	1.24.2.1
+++ includes/xmlrpcs.inc	9 Oct 2009 22:19:48 -0000
@@ -67,7 +67,7 @@
   xmlrpc_server_set($xmlrpc_server);
   $result = xmlrpc_server_call($xmlrpc_server, $xmlrpc_server->message->methodname, $xmlrpc_server->message->params);
 
-  if ($result->is_error) {
+  if (is_object($result) && !empty($result->is_error)) {
     xmlrpc_server_error($result);
   }
   // Encode the result