http://bugs.winehq.org/show_bug.cgi?id=19908
--- Comment #3 from p.drezet@inx-systems.com 2009-09-02 16:05:23 --- I just tested with wine-1.1.28 and found the same problem.
I would have thought this was more than minor? wine and jack would be a very useful application of wine for serious audio system integration projects if such features were implemented completely.
I suspect the fix for this would not be difficult.