Other mistake: When Dorthy is trying to audition for the Muppet's the man says they are gone and the Muppet's bus pulls up. If you look when the bus is pulling up there is no one in it, even the driver seat is empty. Then a few seconds after the bus stops Kermit and Miss. Piggy come walking out.
Continuity mistake: When Davey Stone is running away from the police while singing, after he says, "But I'll give this old lady's melon's a squeeze.", he swings around a street pole. The garbage can lid he is riding on has no handle, but when he slides down the hill and jumps over the front of a snow plow, the lid has a handle.
Continuity mistake: When Abbott and Costello are on the train. Costello walks over to see the guys playing poker. In the background a man closes the back door of the train. As Costello passes you see the door is open again and the same guy closes it again. (00:17:10)
Continuity mistake: When they are dancing the king's earring is on his left ear then it somehow jumps across to the other ear.
Audio problem: In the beginning when Davey is burping, the sound of the peoples' glasses breaking is a little early.
Continuity mistake: When Harpo is playing Russian Roulette, one of the villains claims that the gun has "four bullets" in it. One shot is fired at Harpo, and four by him, totaling five shots.
Continuity mistake: In the scene where Jasmine is about to walk down the isle for the first time, birds fly down with a white carpet. In the shot where Jasmine walks down the isle, the carpet is gone.
Continuity mistake: When Fred Astaire and Cyd Charisse are dancing among the parallel bars, her skirt changes to cullottes then back again to an ordinary skirt.
Continuity mistake: Ann Margaret is seen dancing with high heeled shoes at the beginning of a dance routine and during the routine is seen in flat ballet shoes, then near the end she is seen wearing high heeled shoes again.
Continuity mistake: When the roaches are watching Joe and Lily make out on the couch, there are a few roaches swinging in the lamp. When the lamp tips over onto Lily, there are far more roaches that spill onto her than were on the lamp.
Continuity mistake: During the final dance number, Vera-Ellen's skirt alternates repeatedly between long and flowing and short and tight - perhaps to facilitate some of the dance moves.
Audio problem: 99% of Mooch's drumming is not in synch with the drumming sounds, especially the ride and crash cymbals.
Continuity mistake: On the marquee that advertises the show "Band Wagon", the name of the actress is listed as Gabrielle "Girard", but when the scene switches to a shot of someone holding the program for the show, her name on several pages of the program is spelled Gabirelle "Gerard".
Audio problem: When the airplane door is opened and we see Elvis kissing the stewardess in the doorway, you can hear a crowd of fans screaming - it is brief, but audible. (00:05:25)
Continuity mistake: During the opening of "This Is the Army" [the stage musical], there is a large choir of men singing the opening number, "Some Dough For The Army Relief": from about the second row back, the men's mouths are moving appropriately for the lyrics they're singing, but much of the front row is singing with these obnoxious cheesy grins, not even bothering with more than the most feeble attempt at proper mouth movement. [This is painfully evident during the line "let him do what we had to do."]. (00:48:50)
Continuity mistake: Early in the movie when Thomas falls overboard, John Smith ties a rope around his waist (00:02:56) and jumps in after him. Thomas is very far away from the ship (00:03:12). But when the men pull John and Thomas up, John is holding on to the rope with one hand and the end is left dangling (00:03:36). One of the men who pulled them up then coils the rope with a mere two coils (00:03:48), not nearly long enough to have reached Thomas while he was overboard. In the same scene, when we are viewing the men pulling John and Thomas up from above (00:03:38) there is no extra rope at their feet as there should have been for such a long rope.
Continuity mistake: John Norman (Kris Kristofferson) and Esther Hoffman (Barbra Streisand) are sitting at the table talking. John opens a bottle of wine and every time the shot faces John the cap is on, but when the shot faces Esther the cap is off, over and over again.
Factual error: When Sally and Bryan are in the street, we can see, at their back, election posters. These posters appeared in 1932, one year after the movie is supposed to take place.
Factual error: When a young Steve Mills is struggling for conversation topics with Lisa in 1962, he comments that her black eye makes her look like the Tareyton commercial. However, those "I'd rather fight than switch" ads weren't aired until late 1964.
Audio problem: When CC first meets Hilary, CC is under the boardwalk. As CC talks, the audio is ahead of her mouth movements, and when she says "Ritzy or Cheap?" her mouth is completely shut.