Index: includes/xmlrpcs.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/xmlrpcs.inc,v
retrieving revision 1.21
diff -u -r1.21 xmlrpcs.inc
--- includes/xmlrpcs.inc	5 Jul 2006 11:45:51 -0000	1.21
+++ includes/xmlrpcs.inc	2 May 2008 23:45:30 -0000
@@ -159,11 +159,14 @@
     $ok = TRUE;
     $return_type = array_shift($signature);
     // Check the number of arguments
-    if (count($args) != count($signature)) {
+    if (count($args) > count($signature)) {
       return xmlrpc_error(-32602, t('Server error. Wrong number of method parameters.'));
     }
     // Check the argument types
     foreach ($signature as $key => $type) {
+      if (!isset($args[$key])) {
+      	continue;
+      }
       $arg = $args[$key];
       switch ($type) {
         case 'int':