A few weeks back, while working in photoshop my stylus started going haywire..jumping all over the screen, dynamics were only working part of the time etc. I replaced the battery in my pen, moved the usb thingie, and then proceeded to order a new pen thinking maybe that was the problem. Now I have a brand new pen, and it is still doing the same thing. Im so frustrated and have no idea what is causing this. Could it be a memory problem, or is it the tablet itself? Any ideas or suggestions are greatly appreciated. Thanks...Laura