I have the below warning pop up when I sync my iPhone 4 (iOS 4.2.1) with my iTunes (ver 10.1.2) on my MBP. I've tried deleting the mail accounts on my iPhone (Exchange & Mobile Me), and adding replacements, but still get the same message upon sync. Called Apple Support, and the tech had me do the same steps, with the same results. The sync otherwise works fine, and there are no other issues besides the annoying pop up. Apple Tech said just to dismiss the warning and not worry about it. :-/ Any suggestions?