I just picked up iDVD so i can burn a (couple minutes under) 2 hour home movie. Its a lot faster than version 3 BUT..... In preferences, i noticed when its in the 2 hour "best quality" mode background encoding is grayed out. I'm running a slow machine (G4 sawtooth, yes, i know its very slow for dvds, but i've done it before, i'm patient ) and i could benefit from background encoding . Anybody else see this or did i miss something?