https://bugs.freedesktop.org/show_bug.cgi?id=28800
--- Comment #6 from Marek Olšák maraeo@gmail.com 2010-07-11 17:33:51 PDT --- There is nothing I can do about a crash in WoW and not in the driver, though I believe WoW without S3TC has not been tested by Blizzard QA because there are no Windows drivers that do not advertise S3TC.
I don't think there is an equivalent to force_s3tc_enable in Gallium, and I think the presence of libtxc_dxtn has nothing to do with the texture corruption issue.
Now let's get back on topic.
There are two issues regarding the corrupted textures on r3xx-r4xx.
1) Assigning texture cache regions. This was fixed in r300g some time ago.
2) Occasional texture corruption which seems to be triggered by some other state (e.g. a soldier entering the view). This is a bug in r300g, at least. It's a real mystery to me.