**** Lionel, I looked at your ClipCursor patch, and I think it will work correctly with this for the currently running process, but for it to take effect in other processes, the code you put in settings.c probably needs to go to the new X11DRV_handle_desktop_resize function I just added.
Hmmm, the next time I will boot in Win2K, I will try to have a program continously print the content of the ClipCursor while another one changes the resolution just to check what happens :-) This way we will be sure exactly what Windows does.
If it really propagates, we will see when we will merge both patches :-)
Lionel