A few days ago, I finally called IBM about the problems with the mouse on the new machine. I tried adjusting the speed, I tried cleaning it, I tried running the troubleshooter, but the annoying slight jerkiness continued. I tolerated it until now because I spent much of the summer working at the old machine, in the living room. It was too hot up here most of the time, and I felt too cut off from outside. But this Fall, with all the additional work, I really need to be organized, and to keep my stuff in the office. So, they overnighted a new mouse, I just switched, and I'm back in business. It was a shame to have this practically brand new machine so under utilized. I guess I can't say this minor thing pays for the great warranty...but it is such an improvement that it practically feels that way!