The story is set in America, but Vincent's telephone rings with a double tone heard in countries like Great Britain and Ireland, not the single tone heard in America.
Alice open Vincent's apartment door with a key but a closer shot shows, when the door closes, that the lock uses a magnetic card like in hotels.
Usually, Vincent refers to his dog Vicky as a male, but not always, such as when he says, "You wouldn't have recognized her," while he sits on a bench at the beach.