Continuity mistake: Millie's beads have a mind of their own. They do not stay in place even when she is standing still. Besides the funny scene during the title credits (when it is deliberate), and when Miss Dorothy registers, they also move during a scene when Millie displays her thoughts on Miss Dorothy's beads when the two of them go into the elevator for the first time.
Continuity mistake: When Otto is sat down at his HQ, telling the Vet and Kisko that they would become steak, Otto is holding the newspaper in his hands, but in the next shot, the newspaper has disappeared, and he stands up, holding the steak. (00:20:10)
Continuity mistake: At the end of the film the plane they are initially flying on is a typical passenger plane, but when the Muppets are thrown out, the plane is one used for skydiving.
Continuity mistake: Fiona Fullerton's eyebrows change from full to plucked and back again all through the film.
Continuity mistake: During the last part of the Gold number in the Emerald City, one of the dancers has a costume with a detachable ruffled skirt. The skirt alternately disappears with changing shots.
Continuity mistake: In Owl's house the animators have forgotten to color his umbrella among other things in the background. In a couple of shots later, they have now been colored. (00:29:20)
Continuity mistake: In the prosecuting attorney's speech in the first courtroom scene, the judge's house of cards is no more than 2 levels high (a base level with a peak) [0:2:20]. In the close-up shot of the judge, the house of cards changes to 3 levels high (2 base levels and a peak)[0:2:35]. When the scene focuses back on the prosecuting attorney, the house is back to two levels of height[0:2:39]. (00:02:20)
Continuity mistake: In the scene where the two kings are fighting, one of them pulls a swordfish from the table and after they calm down sticks the fish in his belt. In the next shot the fish has disappeared.
Continuity mistake: When Cratchett gets the bird from the shop, it's clear that the bird is a duck. But throughout the entire film he's referred to as a goose.
Continuity mistake: When Ravenhurst and Princess Gwendolyn keep snapping their fingers, the snapping causes Hawkins to alternately fall under and return from his hypnotized state of mind (as conditioned by Griselda). Hawkins has been hiding behind a closed curtain, and upon each of his flashes of bravery, he opens it, only to be snapped back into hiding. Watch the internal and external shots - he opens the curtain in both of them, as if for the first time upon each occasion.
Continuity mistake: When Leona is telling CC that they will pack up and leave to go see her father, there is an orange shirt on the desk to her left. In the next shot, as she gets up, it has vanished, then it reappears when Hilary goes over there.
Continuity mistake: Near the end of the movie, when Snow White has already been tied up by Lord Malice, the Dwarfelles come to rescue her. As the Dwarfelles are beating up Lord Malice, there's a quick shot of Snow White again and she is untied and has her hands covering her cheeks. Next shot, the fighting between the Dwarfelles and Lord Malice continues and Snow White is again tied up.
Continuity mistake: When JB talks to Ms. Jones on the intercom after talking to his wife on the telephone, he asks where the "You know" is. She says "It's in your top right-hand drawer." You can see him moving to his left.
Continuity mistake: Set in the 1930s, Steve Martin is teaching a class of grade-schoolers in one scene. This would only be picked up by Canadians, but one of the many flags on the wall is the new (as of 1965) Canadian Flag - Red Maple Leaf with two red panels on either edge.
Continuity mistake: When Maggie and Richard Avery leave Professor Flostre's room, she puts a beret onto a statue. About four minutes later, when Audrey runs out the room, the statue has disappeared.
Continuity mistake: When Dorthy runs back into the trailer to get her pet the windows break and are all messed up. But look at the window that breaks in one shot it is perfectly fine next messed up. It changes many times thought the whole scene.
Continuity mistake: In the scene before the king and servant story, the people throw a lot of junk on one of the followers. If you look closely, you can see the accordion used in the scene before piled on him twice.
Continuity mistake: In the very first scene, after the lead flunkie finishes his song, he turns around to speak to Margaret Dumont. When he turns back, look closely at his waistcoat - it's completely different.
Continuity mistake: In the childhood oven scene, there is a shot of the mother peeling steamed tomatoes, the shot of the tomato she throws at Hedwig shows fresh tomatoes, then the tomato looks steamed in the oven.
Continuity mistake: At Molly's party after returning from Europe, the Duchess is introduced, and everyone bows. The shot shows Molly reaching for her neighbor who's standing straight, to bow down, and she does. Then there is a long shot showing the crowd, and the neighbor is again standing, and then you see Molly reach out for her again as she just had.