Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.841
diff -u -p -r1.841 common.inc
--- includes/common.inc	30 Dec 2008 16:43:14 -0000	1.841
+++ includes/common.inc	2 Jan 2009 20:31:35 -0000
@@ -3216,6 +3216,7 @@ function drupal_render(&$elements) {
   // has a #weight.
   if (!isset($elements['#sorted'])) {
     uasort($elements, "element_sort");
+    $elements['#sorted'] = TRUE;
   }
   $elements += array('#title' => NULL, '#description' => NULL);
   if (!isset($elements['#children'])) {