Earlier today I tried to open iTunes 5 and it quit before it even opened. The standard Tiger "unexpectedly quit" box came up and I clicked Reopen. It crashed again. Same box popped up, only this time it gave me the option to "retry" by first automatically resetting iTunes' preferences, so I clicked that. Crashed again. Forth time, crashed again. So I started redownloading the iTunes installer to reinstall it. Before the download was done, I clicked on iTunes again and it started right up. I don't know why it wouldn't work four times in a row, but it seems to be working fine now. I'm thinking maybe Apple has some bugs to work out of this release. I don't think they do .01 releases of iTunes, so I guess we'll have to wait until 5.1.