Index: modules/user/user.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.module,v
retrieving revision 1.728
diff -u -p -r1.728 user.module
--- modules/user/user.module	10 Dec 2006 09:54:34 -0000	1.728
+++ modules/user/user.module	11 Dec 2006 02:58:55 -0000
@@ -1291,7 +1291,7 @@ function user_edit_form($uid, $edit, $re
       '#title' => t('Username'),
       '#default_value' => $edit['name'],
       '#maxlength' => 60,
-      '#description' => t('Your full name or your preferred username: only letters, numbers and spaces are allowed.'),
+      '#description' => t('Your preferred username; punctuation is not allowed except for periods, hyphens, and underscores.'),
       '#required' => TRUE,
     );
   }