Index: includes/form.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/form.inc,v
retrieving revision 1.67
diff -u -p -r1.67 form.inc
--- includes/form.inc	10 Feb 2006 05:25:57 -0000	1.67
+++ includes/form.inc	13 Feb 2006 03:52:44 -0000
@@ -554,6 +554,8 @@ function theme_fieldset($element) {
     }
   }
 
+  $element['#attributes']['id'] = $element['#title'];
+
   return '<fieldset' . drupal_attributes($element['#attributes']) .'>' . ($element['#title'] ? '<legend>'. $element['#title'] .'</legend>' : '') . ($element['#description'] ? '<div class="description">'. $element['#description'] .'</div>' : '') . $element['#children'] . $element['#value'] . "</fieldset>\n";
 
 }