@jace_stknights. After all the problems I've seemed to have with my video card, drivers, etc... I downloaded the latest beta drivers from nvidia, and installed a driver cleaner. Uninstalled drivers, booted to safe mode, cleaned/removed all the left over drivers and such, rebooted, installed new drivers, rebooted, set up my screen.... and then ran a few different demos... and now... your demo works proper in fullscreen, no more bad bottom scroller

so in conclusion it was my system

.
*Note: I still have glitchy scrollers and such though in other demos (not smooth, screen seems to half update/glitch all the time), including my own, idk why. (vsync not enabled?) I really don't know the cause, but it annoys the sh*t outta me, never had problems with my last video card.