Comment 9 for bug 930839

Several of the bugs have the following in the VarLogDistupgradeAptlog.txt:

MarkUpgrade() called on a non-upgrable pkg: 'brasero'
ERROR:root:Upgrading 'brasero' failed
[xcb] Unknown request in queue while dequeuing
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
python: ../../src/xcb_io.c:178: dequeue_pending_request: asserzione "! xcb_xlib_unknown_req_in_deq" non riuscita.

This is similar to the message in bug 930004.