iTunes 9.1 won't install on my MBP (CoreDuo 2.0). Software update says I have the latest software, so I downloaded it from Apple's website. After it downloads I open up the installer and it goes through the process, and it says it was successful, but then I open up iTunes again and it's still ver. 9.0.3. I've done it twice now, and restarted and ran disk utility. Any body else having an issue or have any suggestions on how to fix it?