Following a torrential nighttime rainstorm, the dirt driveway and surrounding earth around the house are perfectly dry early the next morning.
After Nora forcibly invites the policeman at the roadblock into her front seat, he takes out and lights a cigarette. One second later the cigarette is gone.
About 16 or 17 minutes into the movie, when Nora goes back to the attic to try and get Leopold out, he is first seen lying on his back for a couple of shots, back and forth between him and Nora. Then at one point when he compliments her beauty, he is sitting up. When the camera shoots them in a wide shot with Leopold's back to the camera, he is laying on his back again.
During the headline montage at the beginning of the film, one of the headlines misspells "EMPLOYEE" as "EMPLOYE".
When Leopold Dilg is seen escaping to Nora Shelley's house during the rainstorm early in the film, the rainfall is not evenly dispersed across the screen, and several frames show no rain falling at all on the periphery of the shot.
When Nora heads up to the attic with the candle in hand, there is no flame. When she gets to the top of the stairs, the candle is lit.
After escaping from jail one evening and spending the entire night hidden away in an attic with no access to plumbing, Dilg awakes cleanly shaved the next morning.
In some shots, the rain seems to be following just in front of the camera or a double exposure technique was used.
The Professor awakes to find more blankets, but leaves the window open.
Also, the rain is not evident in this scene, despite being stormy shortly before.