http://bugs.winehq.org/show_bug.cgi?id=30878
--- Comment #4 from GyB gyebro69@gmail.com 2012-10-15 11:39:26 CDT --- (In reply to comment #3)
This is not really a regression, ShowWindow(SW_SHOWNORMAL) behaves same way for instance. It's the problem with GetWindowPlacement() API.
Anyway, http://www.winehq.org/pipermail/wine-patches/2012-October/118888.html should fix this particular problem.
The patch indeed fixes the problem here.