You should disable upscrolling >:-) Also, this doesn't intuitively work with a trackball unless you know to use the down arrow. Trackballs? Who uses trackballs

You should disable upscrolling >:-) Also, this doesn't intuitively work with a trackball unless you know to use the down arrow. Trackballs? Who uses trackballs? Well, they get across screen real estate a lot faster, IMHO.