Originally Posted by ffejie
I haven't had any problems with my trackball. When I read your post though, I gave it a try. I put some pressure on the ball and it did not respond left-right very well. Sometimes it would work, other times nothing. However, I'm usually pretty light with the trackball, so I had never seen this problem. It only requires a light touch to move it, you don't have to push down at all.
On my first Tour (which had a glitchy trackball), it was slightly better with very very light pressure on the trackball, but still unacceptable. My replacement works like it should- light touch, firm touch, doesn't matter.
I guess my point is, you shouldn't HAVE to consciously think about using light pressure on the trackball. If so, in my opinion exchange it for a new one, its defective.