Continuity mistake: When the American torpedo bomber attacks the first carrier, it gets shot up and flies past the carrier, crashing into the sea, at which point it becomes a single seat fighter.
Continuity mistake: The scene in the film that follows Berstein's interview with the book-keeper, where he is getting all his notes on various bits of paper out of his pockets: there is a Life magazine on the desk in front of Woodward's typewriter. At the start of the shot where Berstein says: "Mitchell, she said something about Mitchell." the mag has gone, then it reappears and disappears randomly in the subsequent shots in this scene.