Continuity mistake: When Mrs. Napoloni gets trapped by the guards, notice the people around her from left to right: ambassador, thin man with loose hair, elegant man, man with beret. Closeup shot and the thin man has disappeared and a man with a white rounded hat appears out of nowhere, close to the elegant man.
Continuity mistake: When Chaplin is about to deliver his final speech, he walks towards a stone wall with the word "Liberty" engraved on it. The word ends where the staircase begins, and close to it is a staircase with a bare stone wall behind. But when Chaplin ascends the steps the engraving has moved to the very center of the staircase.
Continuity mistake: At the end of the movie, during the famous speech, right before Chaplin says "Hannah, can you hear me?", Chaplin raises his left hand, lowers it to touch his hair, then the scene changes to a shot of Hannah and when back to Chaplin his hand is up again repeating the prior movement.
Continuity mistake: After the plane crashes, the officer reaches to Chaplin yelling "The dispatches". In a wide shot he stretches his arm to the left, but watch his hat. Wide shot: Goggles perfectly visible, and a tiny bit of fur from the other side can be seen. In the close shot, he continues stretching to the left, which is OK, but his hat has swapped sides. The goggles are nowhere in sight, and the fur is perfectly visible.