http://bugs.winehq.org/show_bug.cgi?id=31381
--- Comment #11 from Goblinstomper@gmail.com 2012-08-03 12:09:31 CDT --- So, I took a shot at the kde bugtracker (https://bugs.kde.org/show_bug.cgi?id=304469) and Martin Lubking there was most helpful, if I understand it correctly his conclusion was that ToEE was trying to use an old way of establishing a full-screen window, failing and only using a canvas which kwin can't or don't manage.
As I doubt wine would be using a method which "should not be used since more than a decade" (and enabling LegacyFullscreenSupport in kwin didn't help either) and no one but me having problems with it/reporting it seems unlikely. So I'm started to think that there was something wrong on my end, either that I had failed to provide accurate information - or drivers were at fault, perhaps causing some kind of fallback? (remembered seeing somewhere that xrandr support was questionable with proprietary drivers).
So I removed fglrx and with the free driver everything looks like it is supposed to.
OpenGL renderer string: Gallium 0.4 on AMD BARTS OpenGL version string: 2.1 Mesa 7.11
I suppose this means it's not a winebug but a fgrlx bug.