In the 2 months of mac owning I have never had a single problem with anything. I have never had to force quit a program, the machine has never crashed. I really was beginning to think that macs were infallible. Today I had my first experience of it going a bit wrong. I downloaded and installed 10.6.4, then when it asked to reset I clicked yes. Then the machine powered off, the purple y outer space picture appeared with the spinning clock-face thing, and I waited, and waited, and waited. After 15 minutes or so I thought something was wrong, so I hit the power button, held my breath and crossed my fingers, and it booted with no problem. I am a bit alarmed, should I be?