I am running tiger version 10.4.11, on a G5 2.0. I called apple and they said it was a software problem, so I reinstalled fresh (format and install), and after a day, it happened again. After my screen saver kicks in I move my mouse and it comes back from sleep/screen saver mode and the arrow is stuck there. I have to unplug my mouse and plug it back in for it to work again. Any ideas why? The weird thing is if I am running a program in the background (ie azureus) it doesn't seem to lockup.