http://bugs.winehq.org/show_bug.cgi?id=32620
--- Comment #2 from rankincj@yahoo.com 2013-01-23 18:29:53 CST --- And "no", I can't remember which were the precise last versions of Wine/WoW where voice capture worked. And it's impossible to downgrade WoW to that version again anyway. (I dimly recall MoP being unplayable with Wine when it was released too).
However, this bug would be trivial for other people to confirm because it happens with the "Voice Test".