I have a Microsoft Optical Mouse Blue. I like not having the cord hooked to it, but it does one thing that is very annoying. Every so often, about twice every 5 minutes while in use, the cursor goes down about 3 inches and left about 2 inches, just jumping. Anybody know why it does that or how to stop it? It also more infrequently jumps back to the last page just viewed. Thanks.

