No, I don't have the GNOME3 fallback mode installed. After updating to Wine 1.5.2 now, both games run without any issue. But it also did that for one single launch after my driver update. So I can't say how long that will last... In case it reoccurs - which I guess, taking a glimpse at the changelog - I'll see if I can run it in an X session without GNOME. Thanks, so far!
