http://bugs.winehq.org/show_bug.cgi?id=31797
--- Comment #12 from Rico kgbricola@web.de 2012-09-27 02:41:08 CDT --- It might be a problem with the lib_dxtn. I think the intel driver has a bug with handling compressed textures (e.g. see http://bugs.winehq.org/show_bug.cgi?id=31340 , though I have to retest that bug - all I know I tested with wine > 1.5.11 and the bug was present). What's your intel driver version? According to http://appdb.winehq.org/commentview.php?iAppId=9732&iVersionId=16664&... using lib_dxtn correctly seems to work. The question is, why doesn't it work for you?
Why do you think it's not graphics card related? Try fglrx for the amd card, just to check if it works. On both cards, you are using the open source graphics stack. The problem might be also in there! If it is not graphics card related, there would be a lot more users complaining that it won't work.
Maybe a WINEDEBUG=+wgl log would shed in some light.