Index: modules/user/user.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.module,v
retrieving revision 1.946
diff -u -r1.946 user.module
--- modules/user/user.module	16 Dec 2008 23:57:33 -0000	1.946
+++ modules/user/user.module	19 Dec 2008 15:17:08 -0000
@@ -2257,7 +2257,7 @@
   }
   db_query("UPDATE {users} SET status = 0 WHERE uid = %d", $uid);
   drupal_session_destroy_uid($uid);
-  watchdog('action', 'Blocked user %name.', array('%name' => check_plain($user->name)));
+  watchdog('action', 'Blocked user %name.', array('%name' => $user->name));
 }
 
 /**