I am running 10.4.4 on a PB 1.67ghz 512MB RAM (last revision) I get the beachball of death once in a while when doing very simple tasks like opening a new tab in safari or starting a new ichat. The ball lasts for a while. Also once and a while when launch an app it bounces in the dock for a minute. I can force quit and launch again it will open right away. I also cannot zap the PRAM or reset open firmware. When I boot holding command shift p and r the computer boots into safe boot mode??? Do you think that is a sign there is something wrong with my PB? I have repaired permissions and also ran the apple hardware test. Nothing came up bad when i ran the test. Any suggestions?? Thanks!