According to Apple, my MBP Core 2 Duo 2.26GHz isn't powerful enough to play 1080p videos from iTunes, and they are right, as I tried it and it stuttered! It requires 2.4GHz or higher. Apple iTunes 1080p video system requirements, the link: http://support.apple.com/kb/HT3209 Why in the world does it require so much CPU power to play 1080p vids? I am shocked that I have to upgrade what I thought was a powerful computer just to play 1080p vids! Bring on the comments!