Google Authenticator was wiped completely
Photos would slowly consume more and more memory then crash
I could not reliably select favourites in my burst photos (it would randomly unselect them)
The battery would run out (consistently) at 12%. Whether this was a reporting error or something else I don't know.
I could not type the uppercase I without the "fix".
Mail gestures became unreliable, stopping halfway through the swipe and not registering for the rest.