OK- I have now done a clean install of Tiger on my 1GHz iBook G4 with 640 Mb RAM. It's great except when I'm on battery power. I had it on better performance while it was plugged in today at work and it flew. As soon as I started using it on the bus, I noticed the performance was not so good. I checked energy saver and it had gone back to the automatic setting. So I switched it to better performance and it was still slow. I plugged it in when I got home and it was fine again. What gives? Anybody else have this problem?