Continuity mistake: During the "Why Should I Worry" song, Dodger goes with his "scarf" of sausages through a basin full of wet cement. Logically the cement should be stuck on the sausages, though that does not appear to happen, even though the sausages went through the cement. There is cement on his paws, though, that he needs to wash off.
Factual error: Towards the end of the movie when Ally is in her hallway looking at Jack's old concert tour posters hanging on the wall, the poster closest to the camera says "Washington State Fair" and a 2011 date. Unfortunately, that fair did not get that name until 2013. Before that, it was called "The Puyallup Fair" (officially named the "Western Washington Fair"). Locals still call it "The Puyallup Fair" to this day.
Continuity mistake: In the living room, during the party, Margaret O'Brien does a dance with a straw hat and cane with Judy Garland. In one shot Margaret has on blue slippers and in another shot she has on pink slippers.
Continuity mistake: In the scene where Joe Gideon is helping his daughter with dance exercises and realises that it is time to put Michelle in a cab, he carries her out of the rehearsal studio with her facing forward and her legs wrapped around his back. They turn a corner to go outside and she magically is facing him arms around his neck and legs wrapped the other way around his waist. Also Michelle suddenly grows a yellow rain jacket. There is no time lapse in the dialog which would explain this turn.
Continuity mistake: When Maria is hitting Tony while saying "Killer," her hair is across her left cheek. In the next shot, it is completely away from her face. (01:48:20)
Continuity mistake: During The Miracle of Birth Part 1, when the guy goes into the operating room, the girl puts the gown on the first doctor. It's barely on, but, in the next, wider shot of him, it's completely on and she's tying the back together. (00:04:30)
Continuity mistake: When Pinocchio is locked up in the cage of Stromboli, Jiminy goes inside the cage lock, and he hangs his coat and hat on the outside of the lock. In the next shot, they have disappeared.
Factual error: The Liberty Bell is depicted ringing as the Declaration of Independence is being signed on July 4 (a mistake itself) in the film. The bell actually did not ring on that date, but on July 8, when the Declaration had been returned from the printer and unveiled to the public.
Factual error: The morning after the ambush, Cyrano meets with the baker asking for a private spot. Ragueneau is an amateur poet, and he reads his composition. When Cyrano asks for a place more private than the oven surrounded by men, the baker recites "Jupiter and Pluto are planets, revolving like us, far apart." The story is set in the 1600s, and Pluto hadn't yet been identified as a planet nor sighted, let alone named. It happened in 1930. (00:28:40)
Revealing mistake: During the ghost of Christmas present, Kermit is walking with tiny Tim on his shoulder and you can tell Kermit is walking on a spinning drum. Right before the camera pans away you can see Kermit's feet slide like he stopped walking but the road kept spinning. (00:55:00)
Continuity mistake: Enjolras is holding a book during his protest which disappears and reappears at will.
Continuity mistake: At the end of the "Bye, Bye Baby" song the two girls are standing at the railing with two people in between them and the detective. When the shot cuts to their backs the two people in between the detective and the girls have disappeared.
Continuity mistake: When the Leslie Special is rolled out to be presented to the Great Leslie the red carpet in the front view starts at the building alignment. The aerial shot as seen from Professor Fate shows a wide gap between the building alignment and the red carpet.
Continuity mistake: In one scene, Elvis Presley's prison uniform displays the number 6239, yet in another it becomes 6240.
Continuity mistake: Toward the end of the song "One Of Us" when Kovu is running away and the birds are chasing him, Simba is standing on Pride Rock looking down at Kovu. In the next shot of Pride Rock, Simba is gone, but in the next shot, Simba is back, in the same position as in the first shot.
Factual error: Maleficent states that Princess Aurora will prick her finger on a spindle - the part of a spinning wheel that holds the bobbin. Spindles aren't sharp; what Aurora actually pricks her finger on is the distaff, which is used to hold the fiber before it is spun.
Continuity mistake: When Brown pours water on Shane to wake him up, the wet patch on his clothes changes appearance between shots.
Revealing mistake: When the elephants are making fun of Dumbo in the train caboose, Dumbo's mother pulls a pin which causes the stall door above the other elephants to fall. When the door bounces back up, you can see that the animators forgot to draw the elephants' heads and trunks and only their bodies are visible.
Audio problem: Right before the end credits, as Grave Robber says "But Genco may survive if it undergoes surgery", right as Grave Robber says the word "may", his lips briefly don't match what is being said. (Confirmed in DVD commentary.).
Continuity mistake: In the last scene Gareth Gates was a clone but he had a belly button and the clones didn't have them.