In complete violation of the "No Reboot" policy of Unix and Windows, installing Safari on the Mac mandates a reboot. Quicktime requires one as well, but that's fodder for another post. I have come to terms with Apple not having the time to build incremental App-update technology into their products, even though other s/w vendors have figured out how to do this 5 years ago. But this reboot requirement adds insult to injury, big time!
As time goes by, I am seriously contemplating replacing Mac OS with the Windows 7 RC on my Mac Book Pro. Unless of course 10.6 is a total breath of fresh air. Mac, you're on life support until you redeem yourself.