Corrected entry: In the scenes where the angels gather at the beach to watch/listen to the sunset, they are casting shadows on the sand. However since they don't have "bodies," there shouldn't be any shadows from them.
Corrected entry: Seth exclaims that he sees color when he sees his blood as if he had never seen color before. Are we to believe he couldn't see color and yet says how beautiful the world is a few times before becoming human. This is also a problem since angels aren't supposed to feel emotions.
Corrected entry: The angels in the film are supposed to be seen by absolutely nobody, unless they want them to. However, in several scenes such as those in the hospital and grocery store, both the angels' shadows and reflections in security mirrors can be seen.
Corrected entry: Before Nicholas Cage jumped into the sea his shirt was green. When they shoot the last scene from above it's a black shirt like the other angels.