Index: form.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/form.inc,v
retrieving revision 1.174.2.3
diff -u -r1.174.2.3 form.inc
--- form.inc	29 Jan 2007 21:51:53 -0000	1.174.2.3
+++ form.inc	14 Mar 2007 22:04:42 -0000
@@ -1038,8 +1038,8 @@
     }
   }
 
-  return '<fieldset' . drupal_attributes($element['#attributes']) .'>' . ($element['#title'] ? '<legend>'. $element['#title'] .'</legend>' : '') . ($element['#description'] ? '<div class="description">'. $element['#description'] .'</div>' : '') . $element['#children'] . $element['#value'] . "</fieldset>\n";
-}
+  return '<fieldset' . drupal_attributes($element['#attributes']) .' id="'. $element['#id'].'">' . ($element['#title'] ? '<legend>'. $element['#title'] .'</legend>' : '') . ($element['#description'] ? '<div class="description">'. $element['#description'] .'</div>' : '') . $element['#children'] . $element['#value'] . "</fieldset>\n";
+  }
 
 /**
  * Format a radio button.