Index: includes/form.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/form.inc,v
retrieving revision 1.481
diff -u -p -r1.481 form.inc
--- includes/form.inc	31 Jul 2010 04:01:51 -0000	1.481
+++ includes/form.inc	6 Aug 2010 09:49:33 -0000
@@ -3116,7 +3116,6 @@ function theme_hidden($variables) {
   $element = $variables['element'];
   $element['#attributes']['type'] = 'hidden';
   $element['#attributes']['name'] = $element['#name'];
-  $element['#attributes']['id'] = $element['#id'];
   $element['#attributes']['value'] = $element['#value'];
   return '<input' . drupal_attributes($element['#attributes']) . " />\n";
 }