--- user.module.dist	2005-08-24 16:35:14.000000000 +0100
+++ user.module	2005-08-24 16:35:42.000000000 +0100
@@ -824,7 +824,7 @@
     drupal_goto('user');
   }
 
-  if (isset($edit['name'])) {
+  if (!empty($edit['name'])) {
     if (user_is_blocked($edit['name'])) {
       // blocked in user administration
       $error = t('The username %name has been blocked.', array('%name' => theme('placeholder', $edit['name'])));