I just got a new Tour (had to exchange the first one due to it overheating). Last night the trackballs horizontal movement quit. I thought it felt like there may of been a grain of sand or something on the ball. I goofed with it for a while and got it to work again. Is it possible for something like that to happen, or is this a warning the trackball may quit. The phones man date is 7/20/09. I hate to have to start over with a new phone again. Thanks