http://bugs.winehq.org/show_bug.cgi?id=37065
--- Comment #2 from Christopher Thielen cthielen@gmail.com --- I created a simple Windows program and compiled it with MinGW with loads the specified myst.exe cursor .cur file and it does _not_ have the transparency issue (it displays correctly), so this bug has to do with the interaction of the cursor display bits and whatever else Myst is doing with the video mode.