Continuity mistake: When the third sack drops from the sky and knocks the thief out, Raul is holding the car's remote turned 90° between shots. (00:10:35)
Factual error: The term mayor of Paris was abolished from 1871 till 1977. But we see Victor Maynott wants to join the mayor campaign in 1910.
Continuity mistake: The giant maker compound was purple when Franqcuer was created, but it turned orange when Lucille made another giant flea.
Other mistake: The protagonist uses his belt to temporarily fix the movie projector. He has to keep his pants on with his hands, but that's only until he has to grab an object and the pants do drop. Then he is still belt-less but the gag ran its course and his pants are not falling off anymore, once was enough.