Continuity mistake: When Dorothy slaps Lion on the nose for chasing Toto and shouts, "Shame on you!" in the wide shot, we see Dorothy's right arm with no mark on her skin. It then cuts to the medium shots, and there's an inexplicable long, thin blue mark (it's not a loose thread) on Dorothy's arm near her elbow, while she's holding Toto. This blue mark vanishes in the wide shot when she puts Toto down, and Lion begins to sing. (00:50:25)
Continuity mistake: When Dr. Meade announces General Lee's victory (and later Rhett Butler as a special guest) at the "Monster Bazaar", he speaks to a backdrop showing the audience with a soldier with a drum standing left to him. Behind him, a couple in black is dancing. When he moves, Rhett and Scarlett are revealed, going to the rear of the dance floor. Clearly they haven't met at that point, as they are introduced by Melanie moments later.
Continuity mistake: When the stagecoach enters Tonto street, it's shadow switches sides between angles.
Continuity mistake: Cathy and Heathcliff run away from two dogs as they spy on the party and Heathcliff helps her up the wall. In the next shot he is already on the wall and jumps down.
Continuity mistake: When Jefferson Smith goes to talk to Senator Paine he fumbles with his hat when he meets Susan. As he bumps into the table on his way out his hat disappears.
Continuity mistake: When the curtain gets stuck to Ballantine's pants, at first it's stuck on his side, then in the next shot it's stuck in the middle of his back.
Continuity mistake: When Casper the Caveman takes off his caveman's outfit to go swimming, he puts his outfit near the edge of the bank. After Daffy says that he can't swim, he reverses back onto the land and goes and collects his suit, but this time the suit is now much further away from the bank.
Continuity mistake: When the dog in the audience has his feet crushed by the hippopotamus sitting down on his chair, you can see that there is an empty chair next to the dog, but in the next shot the chair has disappeared.
Continuity mistake: During the Blue Birds in the Moonlight song you can see Gulliver holding his drink. In the next shot while he's laughing the drink has disappeared.
Continuity mistake: When Cagney jumps onto the train in a wide shot, the steel car at his back is visibly taller than the wooden car he is facing. In the following close-up, the steel car has morphed into a shorter wooden car, same height as the other.
Continuity mistake: Gloria (Eve Arden) caps her bitter statement by plucking something to eat with her fingers. As Anita's gramps arrives, she is eating off her plate with silverware. (00:03:25)