http://bugs.winehq.org/show_bug.cgi?id=13702
--- Comment #20 from Tobias Jakobi liquid.acid@gmx.net 2010-09-08 16:26:53 CDT --- Anyway, I think we can close this one here as duplicate of bug #24276.
There are still more Splinter Cell graphics issues, but these are tracked in bug #9609 and bug #13869.
Henri has already submitted a patch to issue a warning if s3tc support is not found, but it was not accepted yet. I'm going to close bug #24276 when the patch goes mainline.