Since switching over a year ago, I've been exceptionally pleased with the performance of my Powermac G5. However, lately things seem to be getting slower and slower-especially booting up. So I went to Disk Utility and Verified and Repaired permissions. It had a whole lot of things to fix, mainly in my printer software and Flash. So, I asked myself...what the hell is it doing? I've realized I take so much for granted...this being my work machine. So what are permissions?-Sort of like Windows Registry? Second, I really don't want to lose my hard drive, I have a bunch of external hard drives I can back up to but, being a noob at Apple ways. What's the best way to backup? What program to use? I want to upgrade from 10.3.9 to 10.4.x so what other steps should I take? Any more comments are appreciated regardless of what it concerns, as long as it might help me or give me a different opinion! Lets hear it, give me the lowdown!