Oh yeah you're right! Gemini Rue still doesn't work in fullscreen for me either. I never play AGS games fullscreen so I never noticed this problem, but now that you mentioned it I went back to try other Directdraw games like McCarthy Chronicles (which works fine in windowed mode since it's 32bit) and La Croix Pan (which uses an older engine version so I can't even select a renderer), and it had the same problem in fullscreen! Super weird. However my own games, which run under Direct3D in 32bit, had no problems either windowed or fullscreen (aside from being stretched).
And somehow Windows 7 doesn't understand the winsetup, every time I close it it asks me whether it was installed correctly or not... but that's another problem.
And somehow Windows 7 doesn't understand the winsetup, every time I close it it asks me whether it was installed correctly or not... but that's another problem.