Detailed Description and Symptoms
Jobs with 'Send Notifications' can hang, if the notification used has been deleted.
This is a known issue. At this time, notifications can be deleted even if they are being used on existing jobs via 'Sent Notification' conditions.
As a result some of these jobs can get stuck in the Backlog.
The workaround at this time is to delete the conditions in the job and re-create them as required or remove the conditions using the subvar. This issue is currently being evaluated for inclusion in Service Pack 7 of v8.0.