QSocketNotifier: Can only be used with threads started with QThread
I'm getting this error after the latest mail refactor, which includes several deferToThread. I suspect this is because the signal handler is not started from the main thread (qt4reactor uses the QSocketNotifier I believe). This seems to be associated with a failure to notify latest unread mails.
(from redmine: created on 2013-12-25, closed on 2014-01-07)