phpBB-Social-Network/phpBB-Social-Network — pull request #138 by Senky (2012-12-12 13:43:37+00:00)
Title: Notification count does not ignore deleted users

If you send notification by user A to user B and you delete user A before use B reviewed that notification, user B can see 1 unread notification, but is unable to see it after he opens notifications page.

http://phpbbsocialnetwork.com/viewtopic.php?f=44&t=4412