http://bugs.winehq.org/show_bug.cgi?id=31595
--- Comment #19 from kisak42@gmail.com 2012-12-13 17:21:03 CST --- Mr. Eikum, Thank you for your continued interest in this issue. I tested UT3 against 1.5.19 a few days ago and it still fails.
My current thoughts on this matter is that there may be some code in a dependency that is sensitive to the change made between 1.5.1 and 1.5.2 and the GCC 4.6.3 / bdver1 optimization on my system. There has been no indication of a misconfiguration in my system outside of wine. The reason I suspect a dependency of wine is that pre-built wine packages from PlayOnLinux are equally affected. I'm thinking that the bdver1 optimization across my system causes a fringe use-case that is not reproducible unless a bdver1 or bdver2 processor is used in the test.
As a side note: the recent improvements in the nvidia binary blob has caused UT3 to become much more playable on wine 1.5.1.