Continuity mistake: As Zeke feeds the pigs we see his hankie sticking straight up out of his back pocket. He doesn't touch it but later before he pulls it out after rescuing Dorothy, it's hanging downward and much more is showing. (00:04:00)
Continuity mistake: As Dorothy stands in front of the Wicked Witch the ruby slippers are protruding over the step. In the next shot they are several inches back from the step. (01:16:50)
Continuity mistake: If you look at Dorothy's dress, it's wet before she throws the water on the Wicked Witch. In the next shot the water spot (on Dorothy's dress) disappears only to return later when she gets the broomstick. (01:26:20)
Continuity mistake: When Dorothy asks the Wizard to take her back home, in every close-up of her the Scarecrow disappears from behind, only to reappear in the rest of the shots.
Continuity mistake: You see a Flying Monkey with Toto before he gets picked up. (01:15:30)
Continuity mistake: In a close-up of the Tin Man as Dorothy says, "We were just wondering why," there is no oil on his shoulder joint. In the next shot his shoulder joint is wet. (00:45:40)
Continuity mistake: When the four are at the end of the hallway to see the Wizard, Toto is near the lion's feet. As it switches shots, he is behind The Tin Man.
Continuity mistake: Not only does Dorothy's hair change length during the film, it also changes shade. (00:19:40 - 00:22:15)
Continuity mistake: The Wicked Witch looks over at Dorothy and says, "I can't wait forever to get those shoes" and the metal hand she uses as a book mark rotates 90 degrees in her direction without being touched. (01:18:00)
Continuity mistake: Dorothy says, "Oh, now I'll never get home" and her dress is clean. Several shots later the Tin Man asks, "What have you learned, Dorothy?" and there are now spots all over the front of it that last for the rest of the scene. (01:35:25)
Continuity mistake: At the start of the "lions and tigers and bears, oh my" sequence, Dorothy, the Scarecrow and Tin Man are all standing separately, then the shot cuts and they're suddenly arm in arm. (00:48:45)
Continuity mistake: As Dorothy throws the water on the Wicked Witch the Tin Man goes from holding his ax in front of him to holding it close to his chest with the ax head sideways between shots. (01:26:20)
Continuity mistake: We see the top of the house before the Wicked Witch appears and the right half and chimney are dark. After she appears the lighting has changed and the top of the house is all lit up. (00:45:55)
Continuity mistake: When Dorothy first enters Munchkinland she steps out and in a front view we see her holding her hands close to herself, but when we look from behind, her hand is way out to the side. (00:18:50)
Continuity mistake: When the mayor of the Munchkin City comes out of the doorway his over sized watch reads 5:30. In the next shot it reads 5:00. (00:25:40)
Continuity mistake: Dorothy is standing against a tree stump when the Wicked Witch throws the fire down at them. In the next shot she's nowhere near the stump. (00:46:20)
Continuity mistake: When Dorothy walks on the pig sty Zeke walks to his right, looks into, than passes the bucket on the right because it's empty. He then picks up the bucket behind it on the bench and proceeds to feed the pigs. He empties the first bucket then picks up the second empty bucket, which is now three quarters full. (00:03:55)
Continuity mistake: Throughout the film, if you look at the Wicked Witch's nose, you can see that in some scenes the prosthetic nose is barely longer than Margaret Hamilton's real nose. In other scenes, the tip of her fake nose hooks almost all the way down to her mouth.
Continuity mistake: When Glinda sings, "And Kansas she says is the name of her star" you can see the black manhole cover behind her and none of the Munchkins that are around it in the next shot are there. (00:23:15)
Continuity mistake: Just before the Wicked Witch leaves Munchkinland she says to Dorothy, "just try to stay out of my way" and her broomstick is facing upwards. In the next shot it's facing downwards. (00:30:35)
Suggested correction: In between shots, in order to threaten Dorothy more, the Witch leaned down towards her more than in the first shot. Therefore, she had to lower the broom so she could do that without the broom getting in the way.
These shots are back-to-back. There's literally no time for her to have lowered the broom between shots. She would have had to have done it in 1/24th of a second... about 8 times faster than it takes you to blink your eyes once at normal speed. It's just not possible.
