http://bugs.winehq.org/show_bug.cgi?id=18318
--- Comment #15 from Dmitry Timoshkov dmitry@codeweavers.com 2010-07-12 23:21:00 --- (In reply to comment #14)
The video driver I used to correct this bug is a "beta" or "testing" driver. Are you able to tell is this bug was caused by 1) the too aggressive use of new functions in a "Test" drivers or 2) the correction of a defect in the "general release" driver. If the answer is 1), then wine needs to back off of using "testing" functions and revert to "general release" functions. If 2), then this bug is truly invalid.
Did you test that the painting really has been fixed by a driver upgrade and not a change in Wine?