Continuity mistake: The scarf around Ellie's neck (in the car) repeatedly changes. Make up your mind, love.
Continuity mistake: When Robert Donat is sword fighting with the Count Montego, Count Montego's sword switches from right hand to left hand.
Continuity mistake: Bertha Krasnoff, a furrier known to her customers as Madame Valerie, has a purse hanging from her left arm as she says goodbye to a customer exiting the shop. When she greets another woman entering the shop, the purse is now on her right arm.
Continuity mistake: Tom Caldwell failed to convince the board of his company and leaves the meeting dejected, his blueprints under his left arm. When he is coming out of the room, the longer rolled sheet is in his hand already. (00:07:30)