As Jack Knife walks across his room he puts on his glasses, just before he reaches the door his glasses fall off. When he opens the door to Madame Blossom his glasses are on his face again.
The blacksmith's arms are cut off above the elbow. Yet, his elbows are visible throughout the rest of the film.
Poison Dagger jumps out the water in the bath, with his hair dry.
In the beginning of the film a few modern buildings can be seen in the horizon.