I've had no problem submitting iOS 7 compatibility fixes with it specifically mentioned in the releases notes and downloaded other updates that have as well (e.

I've had no problem submitting iOS 7 compatibility fixes with it specifically mentioned in the releases notes and downloaded other updates that have as well (e.g., 1Password if I remember right). As far as I know you're only restricted from apps built with Xcode 5 and built against the iOS 7 SDK rather than with Xcode 4 and weak-linked to iOS 7 parts.