<div class="FTQUOTE"><begin quote>
Originally posted by: aphex
Well i'll be, it was that update Kaido mentioned. WTF?
Why would it crap out now?
</end quote></div>
Despite Apple's illusion of everything being peachy-keen, nearly every one of their updates is plagued with problems initially. 10.4.10, among other things, caused the audio to pop on a number of machines. I've also read of it "killing" other machines, similar to your situation. The trick to get around this is simply to wait a week or two to see what the bugs are and to see if Apple releases a small follow-up patch. Forums are a good place to learn of bugs, but MacInTouch and Accelerate Your Mac usually have compiled reports that are useful:
http://www.macintouch.com/
http://www.xlr8yourmac.com/
For example, I did a search on MacInTouch for "10.4.10" which brought up the user experiences here:
http://www.macintouch.com/read...cosx10_4_10/index.html
People with all types of Macs send it their reports and weather the update is working properly or not, along with what problems they are specifically having. Just by quickly scanning the experiences you can see reports of audio problems, problems with certain USB Printers, and so on. If the problem gets really big you will probably see it on Engadget. The Unofficial Apple Weblog documents major problems as well:
http://www.tuaw.com/
You can setup RSS feeds with the majority of these sites and then quickly browse the latest entries daily or weekly to see if there are any problems before updating. It's also good to have SuperDuper update your clone file on an external hard drive before updating so that you can recover the pre-updated system without any hassle. It's a bit of work setting this up (RSS feeds & dumping the initial clone file), but if something catastrophic happens like in your case it can be a real lifesaver at the cost of pushing the backup button in SuperDuper before you run System Update.