Hi, Just curious if anyone has any insight into how to solve this issue. I have a MacBook Pro (Intel, running Leopard) and a Kensington BT mouse. This problem seems to come and go, but more often than not the cursor movement is really erratic with the mouse -- will jump from spot to spot and can be very difficult to precisely position. I've tried replacing the batteries, but with no success. Just curious if there is anything to be done short of buying a different mouse. (As far as I can determine, I have the latest driver). Thanks.