Corrected entry: When Dr, Frankenstein introduces the monster on the stage, he makes the monster take some steps back and forth. The sound is an extremely deep and loud clomping we would expect from a big heavy man wearing those heavy shoes. But in the tap dance, the same heavy shoes change to a light tap sound that matches Dr. F's tap shoes, no heavy sound as if worn by a smaller person. Even if the monster was light on his feet he couldn't suppress the sound of his heavy shoes on the wooden stage.
Corrected entry: While playing darts at the castle, Inspector Kemp upsets Dr. Frankenstein by talking about the possibility that he has created another monster. This distracts the doctor as he is throwing his five darts (one ends up on the wall, two out the window, one hits a cat, and one is tossed behind his back). But when the inspector's car leaves, there are at least six darts in the tires. (00:59:45 - 01:01:15)
Corrected entry: When Inspector Kemp comes out to incite the villagers to riot, the clock in the steeple shows 10:30. But the classic mistake is made- the hour hand is exactly on the 10, even though at 10:30 it should be halfway between the 10 and 11.
Corrected entry: Frau Blucher's name makes the horses whinny because Blucher is the German word for "glue". Draw your own conclusions.
Corrected entry: When the monster sits on the teeter-totter and flings Anne Beesley (Little Girl) through the window, she lands on her bed, head on pillow, eyes closed as if asleep (or knocked out by the landing). When her parents, rushing upstairs, open the door, she is tucked neatly under the covers.
Corrected entry: When the monster enters the blind man's house, the room is well lit. Why would a blind man bother to have lamps burning?
Corrected entry: Inspector Kemp is known in the village to have had his right arm to be prosthetic (supposedly torn off by the original monster), but during the searching in the woods scene, after the riot starts, when he signals the villagers to keep quiet, his LEFT arm is suddenly prosthetic. The entire shot was apparently made of the villagers moving from left to right, but the negative was threaded backwards to get them to move from right to left. The Inspector's eyepatch is also on the wrong eye, and a villager is holding his shotgun left-handed (shown at the town gathering at the start of the riot as being right-handed).