Index: includes/theme.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/hierarchical_select/includes/theme.inc,v
retrieving revision 1.4
diff -u -F^f -r1.4 theme.inc
--- includes/theme.inc	21 Mar 2009 20:07:46 -0000	1.4
+++ includes/theme.inc	30 Jul 2009 07:47:28 -0000
@@ -32,6 +32,7 @@ function theme_hierarchical_select($elem
   );
   $element['#attributes']['class'] .= ' '. implode(' ', $classes);
   $element['#attributes']['id'] = "hierarchical-select-$hsid-wrapper";
+  $element['#id'] = "hierarchical-select-$hsid-wrapper"; // This ensures the label's for attribute is correct.
 
   $output .= theme(
     'form_element',