http://bugs.winehq.org/show_bug.cgi?id=10016
--- Comment #6 from Claudio sick_soul@yahoo.it 2008-06-04 13:20:51 --- (In reply to comment #5)
Hmm, this seems to work for me using the demo with Wine 0.9.50; the demo doesn't exactly work flawlessly (I'll file a few bugs), but I don't see this particular issue.
It depends on (relative) process priorities. See appdb entry for age of wonders: shadow magic for more info and a script that sets the process priorities as to work around this bug.
Bug still there for wine 1.0rc3.