At the film's climax, Louise falls from a ferry's upper deck and is clearly barefoot, but immediately afterward, her body is shown on deck with high heels firmly on her feet.
The police officer questioning Eric following Jonathan's drowning wears a black shirt. Uniformed officers of the New Orleans Police Department wear light-blue shirts.
(at around 1h 13 mins) A guy chloroforms another person while struggling to restrain him and talks the entire time for the guy to relax, but his mouth never moves.