Install Leopard, then open itunes, then close itunes. Also works with safari.
For some reason my MCP crashed every now and then when I closed a program.
Went to the apple store, they told me to hand it in for repairs saying it was a warranty thing, gave it to them the next day asking again if it was completely free, and they said, yes, warranty. I actually made sure of that a third time because I was planning on installing snow leopard anyway.
4 weeks later it was ready. 100 bucks. Warranty? There was nothing wrong with it so the warranty didn't cover it, haha! Formated the whole thing and got snow leopard. Problem solved.