Index: modules/user.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/user.module,v
retrieving revision 1.530
diff -u -F^f -r1.530 user.module
--- modules/user.module	14 Nov 2005 21:49:47 -0000	1.530
+++ modules/user.module	15 Nov 2005 18:13:25 -0000
@@ -956,7 +956,7 @@ function user_logout() {
   // Destroy the current session:
   session_destroy();
   module_invoke_all('user', 'logout', NULL, $user);
-  unset($user);
+  unset($GLOBALS['user']);
 
   drupal_goto();
 }