http://bugs.winehq.org/show_bug.cgi?id=17215
--- Comment #20 from Johan Gill johan.gill@gmail.com 2009-07-19 17:22:59 --- It seems Wine and Windows handles sizing of fullscreen windows quite differently.
Windows 98 resizes a fullscreen window on mode change, even if there is no surface.
Wine resizes the window when a surface is added, but not on a mode change.