Other mistake: Just before Ladyfingers starts as the dealer in the big poker game, we are shown how skilled she is, with a close-up of her hands doing an expert shuffle of the deck. Lancey even tells her she hasn't lost her touch. But then she deals the third and fourth cards so badly that they flip in the air and are easily seen as a red deuce and a black deuce. It happens toward the bottom of the screen but slowing down the DVD makes it obvious.
Deliberate mistake: When The Kid visits the farm, the red truck in the background is a Fleetside truck that is definitely not from the 1930s.
Continuity mistake: When The Kid comes in from walking in the rain, his clothes are soaked but his face and hair are bone dry.
Deliberate mistake: During the funeral march you can see that one of the buildings has a 1960s-style air conditioner on the side of the building.
Deliberate mistake: During the funeral march you can see that one of the guys dancing has 1960s-style sunglasses on.