I think I'm on my first trip since the app update, and I'm running into some issues.
It used to be that I could scan any boarding pass off my iPhone and be accepted into the UC. This time, a passbook boarding pass didn't work, but it did work to scan the image of the UC card from app.
Usually, when my BPs are in passbook and I'm within three hours (or whatever it is) of flight time, I can access the BP from the home screen. On my last flight of a trip, it didn't show up. Still in passbook, though.
Speaking of that last boarding pass, the card shows up in the app, but shows gate as "not yet assigned", when everywhere else I can find the gate.