Hi, I have an early 2004 12" iBook G4, which had been doing well the past 2+ years (i.e. rarely crashing), but it has been constantly freezing since I installed 10.4.7. I haven't been running anything but Mail, Safari, and Firefox. It has made my computer almost unusable. I called Apple Care to ask how to make it revert to 10.4.5, but they told me I had to re-install 10.4. I had 10.4 installed via a site license at a site with which I am no longer affiliated, so I have no installation disk. Does anyone have a suggestion? Do I just have to revert to 10.3? thanks for any input!