Index: includes/form.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/form.inc,v
retrieving revision 1.426
diff -u -p -r1.426 form.inc
--- includes/form.inc	8 Jan 2010 06:36:34 -0000	1.426
+++ includes/form.inc	9 Jan 2010 18:19:21 -0000
@@ -237,7 +237,7 @@ function drupal_build_form($form_id, &$f
   // passing in the latest $form_state in addition to any other variables passed
   // into drupal_get_form().
   if ($form_state['rebuild'] && $form_state['process_input'] && !form_get_errors()) {
-    $form = drupal_rebuild_form($form_id, $form_state);
+    $form = drupal_rebuild_form($form_id, $form_state, $form_build_id);
   }
   // After processing the form, the form builder or a #process callback may
   // have set $form_state['cache'] to indicate that the original form and the