Still saving for a new computer, so I'm getting by with my PowerPC G3 slot-loading machine-- I just barely make the upgrade requirements. But I did upgrade to 10.4.3 and now have strange things happening. First, The good news: my screensaver now works, sometimes. The bad news: The computer will go to sleep and not wake up. I push all the keys on the keyboard, move the mouse and try to re-connect it. I end up having to push the front power button to shut down and re-start. I tried setting system preferences to "never sleep", but it doesn't work. So far, this update has been more of a hinderance than a help. Thanks from a wanna-be geek.