They never told me. In the end the replaced the entire system the 5th time because of a screw. When it went into depot for the 4th time someone was a little too enthusastic about tightening the screw and torqed it to the point that when you try and unscrew it, it just sits and spins. The threads were toast. Normally this wouldn't be a problem but I wanted to upgrade the hard drive to my Seagate 160GB. Took it into the Apple store again, and spoke with the store manager. He took it into the back, after 20 minutes he came out and said after looking at the log of all the issues I've had they would replace it outright. Since then *knock on wood* no problems at all. If you want to know all the issues I had:
...
All told I didn't have my system for about 3 weeks total in all of this. thankfully the batteries were a walk in replacement. the other stuff....gah. I will NEVER, NEVER, NEVER buy first gen Apple anything. And even when the come out with a rev B version I will wait a few weeks.
So far though the current system, see below, has been flawless.