Index: notifications.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/notifications/notifications.module,v
retrieving revision 1.6.2.9.2.50.2.8
diff -w -u -p -r1.6.2.9.2.50.2.8 notifications.module
--- notifications.module	29 Apr 2009 16:24:08 -0000	1.6.2.9.2.50.2.8
+++ notifications.module	8 Jun 2009 13:42:33 -0000
@@ -758,7 +758,7 @@ function notifications_load_subscription
   else {
     $sid = $subs;
   }
-  if ($refresh || !array_key_exists($sid, $cache)) {
+  if ($refresh || ! isset($cache[$sid])) {
     if (!isset($subscription)) {
       $subscription = db_fetch_object(db_query("SELECT * FROM {notifications} WHERE sid = %d", $sid));
     }