http://bugs.winehq.org/show_bug.cgi?id=33802
--- Comment #1 from Henri Verbeet hverbeet@gmail.com 2013-06-15 02:38:39 CDT --- (In reply to comment #0)
Please clarify: is there anything wine could do? Or is this a driver bug that I should report elsewhere?
It might be. I know some fixes related to compressed texture handling went into Mesa not too long ago, so the first thing you may want to try is building (32-bit) Mesa from git to see if it's any better there. I should note that I've never seen this error when running SC2 on r600g, though it's been a while since I last tried.