http://bugs.winehq.org/show_bug.cgi?id=17088
--- Comment #10 from carlos.chuim@gmail.com 2009-03-25 01:31:02 --- Another piece of information: minimizing the window (via the task bar) and maximizing it again, bypasses the problem by showing buttons in an "uglier" version of the screen (like in the "half-working*" attachment).