Created attachment 646768 [details] backtrace evolution Description of problem: Evolution may stuck during receiving messages. Demonstration video: https://docs.google.com/open?id=0B0nwzlfiB4aQRzlfOWR6OW9MNzA
Created attachment 646769 [details] backtrace evolution-calendar-factory
Created attachment 646770 [details] backtrace evolution-addressbook-factory
Created attachment 646775 [details] backtrace evolution-source-registry
Thanks for a bug report. I see the factories are basically idle, doing nothing interesting, the only binary which is busy is evolution. I see your IMAP+ account is causing trouble here, it keeps waiting for an idle or something, but it doesn't seem to be able to get to that state. I see that the main thread is doing redraw, and that evolution is using about 25% of CPU, with gnome-shell just behind it. I suspect the higher CPU usage prevents evolution from going to an idle state, and thus finish the IMAP+ requests, all due to the animations in the status bar.
I moved this upstream as [1]. Please see [1] for any further updates. If possible, please CC yourself there, in case upstream developers will have additional questions. [1] https://bugzilla.gnome.org/show_bug.cgi?id=688661