I have a G5 1.6 Ghz and I've been having random crashes. I'm talking really random-can't-reproduce-them-but-they-keep-happening-at-the-oddest-of-times) where my mouse freezes and I have to boot-up. I've replaced almost everything through applecare, and weirdly enough, my Apple Technician at a service centre cannot get this sucker to crash. This has led me to another possiblity: do these crashes have something to do with the fact I have no UPS backup power supply and/or that my building is old and may not be able to support the amount of power supply required to run my edit suite? Has anyone had something similar to this happen to them? ANy suggestions would be greatly appreciated. I will be testing my theory with a UPS unit, but thought I'd ask you experts!