In 'Itchy and Scratchy Land', Cletus takes a picture of one of the robots at the parade, the old lady next to him changes from black to white between shots.
When the car crashes into the pole after Homer says he's not tired and they cut to Bart saying, "Glad that wasn't us," the car is there, but the pole is gone.
There is a spelling mistake in The 'Manèges hors d'usage' sign at the entrance kiosk in the Euro Itchy & Scratchy Land. 'Le Pulverisatuer' should be written 'Le Pulverisateur'.