http://bugs.winehq.org/show_bug.cgi?id=9788
--- Comment #4 from Kris Moore kris@pcbsd.org 2007-09-26 22:05:45 --- I've done some further investigation on this issue, and I'm not convinced its a problem with Wine now. Turns out patch 2.2 rolled out a new software driven sound system:
http://forums.worldofwarcraft.com/thread.html?topicId=1531075321&sid=1
And to confirm this, it appears that many Windows users are having the exact same issues:
http://forums.worldofwarcraft.com/thread.html?topicId=1778015360&sid=1
I guess for now you can mark the bug as INVALID, since it may be something to fix on Blizzards end of things.