Fullscreen issues

hello SDL,

I am using fullscreened pure software SDL for a project, and have
encountered two simular but mutually exclusive errors:

Machines with the errors: Win2k-sp2, WinNT-sp6.

Machines without the errors: Win2k-sp2, WinNT-sp6, Linux, OS-X.

(So some windows machines are effected and some are not.)

Error 1: Starting in windowed mode, I switch to a fullscreen
resolution, and then to a higher fullscreen resolution. This is where
the error happens. The monitor does make it to the higher fullscreen
resolution, but SDL only draws and allows the mouse to move in a smaller
region of it corresponding to the lower fullscreen resolution. The
desktop shows in the remaining area.

Error 2: Starting in windowed mode, I switch to a fullscreen
resolution, and then to a higher fullscreen resolution. This is where
the error happens. The monitor does make it to the higher fullscreen
resolution, SDL draws correctly, but SDL only allows the mouse to move
in a smaller region of it corresponding to the lower fullscreen resolution.

Thanks for any help or pointers.

                -Ray Skoog