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)
Visible crew/equipment: As they enter Oz an equipment shadow can be seen moving on the guards back as they pass by with the purple horse pulling them. (01:00:35)
Revealing mistake: Whenever Dorothy, the Scarecrow, the Tin Man, and the Lion go off into the horizon you can see the line on the floor of the sound stage where the fake horizon is and the scene cuts off right as the four get to that point. (00:57:35)
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.
Revealing mistake: As they exit the Tin Man's scene singing, "We're off to see the Wizard", a bird stretching its wings is casting a shadow on the painted sound stage wall slightly to the right of the house, which reveals it to be a fake backdrop instead of an open area. (00:47:45)
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.
Revealing mistake: In the scene where the Lion sings his "If I Were King" song just before visiting the Wizard, if you watch closely above his moving tail, there is a string holding up and moving around the Lion's tail. (01:04:15)
Continuity mistake: Glinda tells Dorothy, "Their magic must be very powerfulÂ…" and Dorothy has her left hand around Toto. In the next shot she's holding the flowers in front of her. (00:30:20)
Continuity mistake: Inside the cyclone, looking out the window the wind is blowing left to right. In the room the wind is blowing in the window from the right. (00:18:05)
Visible crew/equipment: As Professor Marvel stands at the window looking at Dorothy and his fingers are curled under the sash. If you look closely they are lit up from underneath, but there's no light on their floor. (01:40:30)
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: Prof. Marvel reaches to open the door of his wagon as he walks Dorothy in. In the next shot the door is already open. (00:12:45)
Continuity mistake: After they first meet him when Dorothy pulls the Tin Man's arm down we see her dress and there's nothing on it. In the next shot there are several wet spots on the front of it. (00:41:55)
