Just got an email from Apple's App Review team. They have rejected my app because it "does not fully utilise [Apple's Address Book] API that is included in the app code".
I never included any a line of code about the Address Book. Anyone heard of this occurring before?
Binary Rejected, Apple Jun 6, 2014 02:40 PM
Reasons
2.3: Apps that do not perform as advertised by the developer will be rejected
We found that your app does not fully utilize an API that is included in the app code as required by the App Store Review Guidelines.
Specifically, the app uses the Address Book API, which allows access to the users Address Book database. This feature is not fully implemented within the app.
It would be appropriate to revise your app to ensure this feature is fully implemented or to revise your Application Description, Release Notes, and/or screenshots to remove this content.