In the casino Skipper looks through the periscope and says "I say we let it ride" and pushes the periscope up. A few seconds later the camera looks up at the chimp carrying the second chimp; and the periscope is nowhere to be seen.
When there is a lock-down in the casino, Gloria rams into the metal door and her impression appears on the smaller door. In the next scene when the black vehicle crashes in, her impression is on the bigger door.
US-style amber diamond-shaped traffic signs are seen in the scene, when the penguin's car crashes through the road-work-barrier in Monaco. As all European countries, Monaco uses triangular red-and-white warning signs.