http://bugs.winehq.org/show_bug.cgi?id=20380
--- Comment #12 from Roderick Colenbrander thunderbird2k@gmail.com 2009-10-19 03:30:00 --- I have just tested the demo on latest GIT and on my system I'm not seeing any issues. It works fine using sound. BTW I'm using ATI which at this point uses the generic Xorg software Xrender.
Could you also try to download the demo and see if that one works: http://www.5star-shareware.com/Games/RPG/might-magic3.html