http://bugs.winehq.org/show_bug.cgi?id=20277
--- Comment #9 from Andy personman_145@hotmail.com 2009-12-11 12:47:30 --- You should be able to reproduce the issue by doing the following:
Remove /usr/lib32/wine/winemp3.acm.so
Reinstall your wine package.
Performance will become horrible in oblivion, like 2 fps.
I hadn't considered the possibility that it may have been intentionally removed by the packager. Quite possible I suppose.