I have an iPod Touch MB model running jailbroken 4.0GM. I just got back from out of the country, and when I open iTunes with my iPod plugged in. It says I am up to date with 4.0 and there is no available update. Are there any significant changes in GM to official? I don't know if I should worry about this and get the official 4.0 from the wiki and shift+restore, or just leave it here. Thanks guys.