I am using the mouse on a laminated desk surface, which simulates a maple wood finish. The surface is therefore of non-uniform color - there is a wood grain look to it. Do you think that might be influncing the optical reader to jump the mouse cursor? Bill On 5/26/03 11:26 AM, "Michael Bigley" <wakinyan at fuse.net> wrote: >> It happens at seemingly random moments - I >> could be attempting to navigate to a choice on a submenu, or just moving >> from one spot to another, getting ready to click on a button, or dragging a >> selection marquee... Then boom, the pointer is completely somewhere else. > > I had a similar problem when using my mouse on top of my Intuos > tablet. Change the surface you are using the mouse on. The infrared > reflects or refracts off of some surfaces including the "newer" > mousepads with the slick surfaces. Try just putting a sheet of paper > or carboard under the mouse. If that fixes it go for something more > permanent like one of the cloth-covered mousepads or other > non-reflective material.