"Unread mail" notifications in client are broken.
The "there are xx unread messages" notification in bitmask_client is not working properly. This seems to need work to take unread from memstore. I think I would limit it to INBOX by the way (and perhaps make it configurable in the future: inbox, or subscribed...).
(from redmine: created on 2014-02-25, closed on 2014-04-03)