Created attachment 520170 [details]
Screenshot with my remarks
Problem showed up after upgrade to F15 and Gnome 3.
I often see rendering errors when playing nethack with graphical tiles. For example, some tiles just aren't refreshed in time, message area vanishes from time to time (see screenshot in attachments). If I move the nethack window for a bit, anything re-renders as it should. But shaking a window after every move is very irritating.
I am using Fedora 15 and Gnome 3 with nvidia proprietary drivers.
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