During the first attempt at the robbery, Franz and Arthur are wearing Odile's stockings as masks. When chasing her around the house, the stockings disappear.
When assaulted by his uncle, Arthur's position changes between shots.
When the English teacher writes the word 'Classique' on the board, the first shot shows a much larger 'C' than the following shot. Also, the blackboard now looks like it has just been wiped with a wet sponge.
At the start of the movie when Franz and Arthur get out of the car, Franz shuts his door and points to the house - and again after the cut.
Odile is wearing long socks in the house but when she leaves the house to meet the men at the factory, she is wearing stockings.