Continuity mistake: When Larry is burning his books he throws one at Dorothy who is looking out of the window. The upper right part of a window pane breaks, but in the next shot the left side is broken. (00:11:20)
Continuity mistake: After the FBI agents ask for David at Mr. Saltman's shop they get back into their car which is covered with snow. In the next shot most of the snow is gone. (00:55:50)
Continuity mistake: When Dorothy kills herself by reversing her car down a cliff there is not even a dummy in the car when it's shown falling. (01:05:30)
Continuity mistake: In the scene where Dorothy kills herself she reverses twice. The first time she just touches the fence and stops. The second time, when she breaks through the fence and goes down the cliff, she comes again from a distance. Also some trees that were in the backdrop the first time are gone the second time. (01:05:30)