Read PM and deleted it, but when at Realtime Posts: http://www.digital-kaos.co.uk/forums/vaispy.php it still shows a notification for the message. Clicking on it the PM is still there and readable. Try to delete it again and get an error message "Invalid Private Message specified."

If I go to the main page, the notification is not there. http://www.digital-kaos.co.uk/forums/index.php