One thing that's always surprised me about MUGEN is how well it "emulates" (not the proper term) on Linux and Mac through WINE. Never once have I ever ran into a problem paying MUGEN on whatever OS I choose. I think maybe once I had keyboard problems with MUGEN 1.0, but that was a long time ago.
Any other people here not using Windows? Is there one lone BSD user here? If your on Linux, what distro? Have any of you all had problems using Mugen on wine?