iOS 7 Warning: App references non-public selectors

I'm trying to submit my app to Apple for approval but ran into a problem when validating the build.

I get this error: The app references non-public selectors in Payload/My App.app/My App Name: focused

I have no idea what this means. I didn't change much from my iOS6 build and never had this happen before. Does anyone know how to fix this?

Thanks