Continuity: When Jacquouille is eating on the floor of the living room, the amount of food changes from shot to shot and when Béatrice notices the flooding, his dish is not there.
Great sites
Mistakes
When Jacquouille puts the jewels into a box in the kitchen it's raining. When he leaves it has stopped. See more...
Les Visiteurs mistakes
Continuity: When Béatrice is speaking to Jean-Pierre about cousin Hubert, he wears a dentist mask and gloves but the shot later he only has his gloves, and after that he has nothing.
Continuity: When Godefroy is trying to buy the castle from Jacquard, the distance between them keeps changing.