Continuity mistake: Marquise Maria de Crevecoeur is in her room when Monsieur Duval knocks at the door. Her veiled hat is by her on the sofa. A minute passes; nobody touches the hat or comes close to it, but when Marlene Dietrich gets seated again, the hat and its long veil move. (00:16:50 - 00:18:00)
Maria de Crevecoeur: I didn't know people fished in the dark.
Count Dino della Fiaba: A favorite pastime here in Monte Carlo.
Maria de Crevecoeur: Do you do it?
Count Dino della Fiaba: I'm doing it now.