Continuity mistake: Ms. Dubois takes off her sunglasses during the discussion regarding emancipation and sex, and places them in her lap. Next shot of the Leslie Special racing through town, she is wearing them. Back to the discussion, she is not wearing them. btw: I love the expressions on Tony Curtis during the discussion, and the extras at the end of the race. (02:32:45 - 02:33:40)
Continuity mistake: Watch when Jack Lemmon falls into the giant cake at the beginning of the pie fight scene: he destroys all but a thin vertical pillar on the right side. During the fight, we see two other angles on it before the cake is fallen on again - in a shot from the exact same angle as before - but this time a large portion of it has somehow restored itself, and in a completely different configuration.
Audio problem: In the beach scene near the beginning, Leslie Special comes to a screeching halt in front of Leslie's tent on a bed of sand. Can't burn rubber there.
Continuity mistake: As the bakers assist the Prince to get out of the cake he's fallen into, the General begins to descend the stairs to the kitchen. Yet the general is not seen again until just before the Prince hits him with a pie.