http://bugs.winehq.org/show_bug.cgi?id=27879
--- Comment #4 from GyB gyebro69@gmail.com 2012-02-21 13:57:27 CST --- (In reply to comment #3)
Created attachment 38991 [details] patch
It looks like the game enables blending on WINED3DFMT_R16G16B16A16_UNORM render targets, and the driver hits a software callback. The attached patch helps for me. I'm not sure if there's a good way to detect hardware format blending capabilities.
Thanks, the patch fixes the problem here as well.