I have been having a trackball issue that seems to be a little different than the normal issues people have. What is happening with mine is, it just doesn't move up as fast as it moves in other directions. For example, if I'm reading a long email and scroll down, every scroll of the trackball moves down like 4 lines. When I scroll back up, it will sometimes move the 4 lines, but other times it will like skip my scroll and not move at all, or only move 1 or 2 lines. It is starting to get annoying so I am wondering if any of you have seen this problem, and if so, do you have some sort of fix, or should I take it to the store since I have the service plan.