I want to pamper my iMac G5, but I've been noticing its fans come on and the CPU temperature topping 70 degrees centigrade even when I'm only running a few apps. (Finder, Dashboard, several Safari Windows, iTunes, Illustrator). The top left corner of the back of my iMac (from the front view, ie. reach around with your left hand and touch the top left corner) is the warmest part, and is quite warm when the CPU gets hot, but I notice that it's not nearly as hot as what my old Dell laptop would sometimes produce (when you touched its underside.. sometimes its powerprick would get so hot as it would shut down and refuse to work until it cooled off). Should I really be worried? It's just that this is such a beautiful machine and it would be a shame if I had one of those defective ones with a power supply that overheats, causes a fire, and nearly kills someone. Or are my suspicions unwarranted?