My iTunes movie downloads won't sync with my iPad (new) or iPhone 4. I keep getting an error message stating I'm not authorized to sync these movies. My computer is definitely authorized with my iTunes acct-- I even tried deauthorizing & reauthorizing. I am only using one iTunes account, so it really shouldn't be this complicated. These same movies play perfectly fine on our apple tv using home sharing. I even downloaded them on to my iPad from "purchased" within the iTunes store, and they play just fine. This takes a lot longer than just syncing though. For testing purposes, I added the movies to a flash drive and then copied them over to iTunes on my authorized work iMac-- they synced successfully. So there is clearly an issue with my MBP at home. Has anyone else had this problem? Any advice?