how do you backup iphone when some of the apps have the old style appleid? i have an iphone 4s.  some of my apps where installed with my original apple id from years ago. at some point apple required/changed everyone to use email as their apple id.  Now when i try and back up my phone it asks for password, but it never succeeds because of the mismatched appleids. i cannot complete a backup in itunes.

anyone elese run into this issue?
Have you tried HT201272 app store download ID incorrect (does not match settings ID)? (In short: Logout on your iPhone then re-sync via cable with iTunes)