--- fb_user.module.orig	2010-11-23 11:20:50.000000000 +0100
+++ fb_user.module	2010-11-23 11:19:48.000000000 +0100
@@ -105,7 +105,9 @@ function _fb_user_special_page() {
  * Helper to ensure local user is logged out.
  */
 function _fb_user_logout() {
-  session_destroy(); 
+  session_destroy();
+  // Fix for http://bugs.php.net/bug.php?id=32330
+  session_set_save_handler('sess_open', 'sess_close', 'sess_read', 'sess_write', 'sess_destroy_sid', 'sess_gc');
   $user = drupal_anonymous_user();
 }