Super Grover

Visible crew/equipment: While Dorothy and the other characters are cornered in the Wicked Witch's castle, when Dorothy grabs the bucket of water and tosses it at Scarecrow's arm, the water hits the Witch. In the closeup of the Witch's face, you can see a crew member's hand (a long sleeve can be seen at the wrist) in the upper left side of the shot. (01:26:20)

Continuity mistake: When Professor Marvel guesses why Dorothy is running away, she's holding her suitcase with the lid facing Marvel. But in Toto's closeup, as he snatches the hotdog from Marvel's long grill fork, the suitcase is turned the opposite way with its lid facing Dorothy. Then it changes back, so the suitcase lid faces Marvel again. (00:12:10)

Super Grover ★

Revealing mistake: During some scenes, straw-stuffed Scarecrow's pant legs and his boots would sometimes have a gap that reveals the skin of Ray Bolger's leg. Two examples are, at Emerald City when Scarecrow places Lion's "cape" on him, and also when Dorothy and her friends are told the Wizard says to go away. (01:05:50 - 01:07:25)

Super Grover ★

Continuity mistake: After Zeke rescues Dorothy from the crowded pig pen, Hickory wipes his face and neck with the rag in his right hand, but then it cuts to another angle, and the rag is suddenly in his left hand. (00:04:20)

Super Grover ★

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)

Super Grover ★

Continuity mistake: While Dorothy, Tin Man, and Scarecrow are walking in the dark and creepy forest, just as Dorothy begins to sing "Lions and Tigers and Bears" in the medium shot, Tin Man is holding up the axe in his left hand. But it cuts to the long shot, and the axe is in Tin Man's right hand between shots. (00:48:40)

Super Grover ★

Revealing mistake: In the Haunted Forest, when the Tin Man is lifted up then lands back on the ground, at Tin Man's lower back you can see his white T-shirt tucked into his pants. (01:14:10)

violets69

Continuity mistake: In the beginning while Dorothy is still on the farm, she walks along the pig pen fence and then falls in. When Bert Lahr picks her up out of there her dress is perfectly clean. (00:03:45)

Visible crew/equipment: There are multiple fragmented reflections of studio lights on Dorothy's bedroom window, as it rips off due to the twister. (00:16:20)

Hamster ★

Continuity mistake: When the Munchkins come out onto the Yellow Brick Road, one of them comes out of a sewer hatch on the yellow bricks. It's located on the ground in front of the first small white cottage with the thatched roof, right behind Dorothy's house. Throughout this scene, the dark hatch is visible whenever we see that specific location, such as when the Wicked Witch of the West asks, "Who killed my sister? Who killed the Witch of the East? Was it you?" but as Dorothy begins to "follow the yellow brick road", there is an overhead shot followed by a front shot and the dark hatch has disappeared.

Continuity mistake: After both Dorothy and Scarecrow have oiled Tin Man's elbows, Dorothy pulls the Tin Man's arm down and we see her throw the apple that she's holding down behind him. In the next shot it reappears in her left hand. (00:41:55)

????

Revealing mistake: Soon after Dorothy slaps the Cowardly Lion, she looks as though she is about to laugh out loud. This happens about 10 seconds or so after the slap. She even tries to put Toto in front of her face to cover up her smirking. (00:48:45)

Continuity mistake: You see a Flying Monkey with Toto before he gets picked up. (01:15:30)

Continuity mistake: Inside the Emerald City, when they are at the palace entrance, the guard's mustache is turned up in the first shot, and is turned down in his next shot. (01:04:45)

violets69

Continuity mistake: When the Wicked Witch scares the Scarecrow, Dorothy, and the Tin Man with fire, after the fire is thrown, not only is the Tin Man's funnel cap on backwards, everything is reversed. In order to keep the characters oriented from left to right correctly, they had to show the film from the wrong side, thus the buttons of the Scarecrow's jacket and everything else are on the wrong side. (00:46:40)