Continuity mistake: During the middle of the film, a butler comes in and out of the Dictator's office several times repeatedly. The door is open and shows the corridor outside the office, casting the shadow of a window off-screen. The shadow changes from small to big bewteen shots.
Visible crew/equipment: In the scene on the airplane, last 1/3rd of the film, the plane crashes into the ocean and the camera shot starts bouncing up and down - you can see the airplane has no roof and the studio lights are visible.