I'm using a silver door dual 1.25GHz G4 running Tiger (10.4.2)... My mouse and keyboard keep freezing intermittently (usually in the middle of a very careful Photoshop selection... VERY frustrating). The only way to fix it (at least for a few minutes) is to unplug the USB cable from the computer and plug it back in. PLEASE HELP... it's getting more and more frequent, making it almost impossible to work!