--- user.module.orig	2006-08-02 21:08:14.000000000 +0200
+++ user.module	2006-08-02 21:08:31.000000000 +0200
@@ -1187,6 +1187,7 @@ function user_register() {
      '#title' => t('Notify user of new account')
     );
   }
+  $null = null;
   $extra = _user_forms($null, $null, $null, 'register');
 
   // Only display form_group around default fields if there are other groups.