https://bugs.freedesktop.org/show_bug.cgi?id=24047
--- Comment #11 from Andy Furniss lists@andyfurniss.entadsl.com 2010-06-01 02:59:35 PDT --- (In reply to comment #10)
ping
s3tc has never worked for me using a RV670 with git drivers, it affects all the games I've tried - etqw, quake4 demo, et wolf, ut2004 demo and doom3 demo.
Of course disabling s3tc in .driconf will workaround it apart from quake 4 (refuses to start without s3tc) and etqw (which then hits some other shader errors).