the actual mouse position and the from sdl reported mouse position do not
map.
this problem only comes up when i start my application in fullscreen mode
using the flag SDL_OPENGLBLIT under windows,
but everything works fine under linux.
I currently fixed that localy by changing the SDL src so it does not use the
actual direct input relative data, but the current position
returned by GetCursorPos. Hope you fix that problem with a better solution
and an official update soon 