On C&C red alert (using installer from
http://cncnet.org/red-alert) there is a minor glitch that the start orb sticks in fullscreen. It's minor because it is fixed with compatibility mode for Windows 7, however it would be a major glitch otherwise, since it is so big at that resolution.
Edit: No, it wasn't compatibility mode that fixed it, it was switching from gdi to OpenGL. This makes the glitch much worse since it could break other games that don't have that option. Disabling custom start button fixes it, as well.