Continuity: When Mary Poppins just starts to sing "Feed the Birds", she sings "The little old bird woman comes" but if you look very closely at the end of this shot, you can see that her mouth does not finish the word "comes" (her mouth stops at come).

Visible crew/equipment: In the tea party on the ceiling sequence, 2 shots after Uncle Albert tells his long underwear joke, Jane does a backflip in the air. If you look closely you can see the wires that she is hanging from. (Time)

Revealing: When Mary Poppins has the robin on her finger, just after the outside shot where the robin does his whistle bit, you can see the cables used to operate the bird on the back of her hand while she turns away from the window.

Revealing: After Michael and Jane have been sucked into the chimney and then pop out, Mary Poppins pops out a short time afterward. When she does so, a dark, obvious cable can be seen supporting her.

Continuity: In the scene where the bank executives are basically harrassing Michael to give them his money, there is a shot where they are singing and marching forward and force the children to back into the wall. There is a pattern of large squares on the floor, and the men in the back are on the inside edge of the square. Then the camera goes out for a long shot so Mr. Dawes can talk about the banks of England. Now he is standing on the edge of the square. When he finishes his little speech, in the next shot they are standing back in the original position.

Continuity: In the shot where Jane and Michael are looking out the window at Mary Poppins you can see Jane's bangs are blown to the right side of her forehead because of the wind. In the next shot they're combed perfectly straight again.

Visible crew/equipment: Near the end of the movie after Mr. Banks throws the kite in the air and the camera shows the kite, you can see a white wire to the left of the kite that isn't the kite's string that pulls the kite over.

Revealing: When the penguins walk in front of the table where Mary Poppins and Bert are sitting, the table can still be seen through the penguins. (Time)

Continuity: When everyone is on top of the roof, Mary Poppins powders her nose, which results in her nose being black with soot. The scenes following that, her nose is normal and never black as when she powders it.

Continuity: During the first few scenes, you see Jane is missing a tooth but the tooth disappears and reappears throughout the film.

Continuity: In the scene where Mr. Banks takes the children to the bank, and they meet the directors, first the children are standing close together, with Mr. Banks right behind them. Later, when the elder Mr. Doors is talking to them, Mr. Banks is next to Michael and the children are farther apart. Later still, when we see Michael close up, Jane is out of the shot altogether, meaning that she is even farther away from him than previously.

Continuity: When Bert is showing Jane and Michael his chalk sketches and doing his tightrope demonstration, you can see the pigeons in the corner on the far side of the bench. In the next shot when Jane points out the English countryside, the pigeons are right behind Bert again and walking away.

Continuity: Jane and Michael switch sides while they are holding Burt's hand when he walks them home.

Audio problem: After Bert rescues the Fox from the dogs the Fox says "Tis an elegant merry go round horse." If you look closely you'll notice that the voice recording is slightly off-sync with the animation on the Fox's mouth.

Revealing: During the 'Spoonful of Sugar' musical number, when Mary Poppins is singing to the robin in the children's room, the wire connected to the audio-animatronic bird can be seen just under Poppins' two fingers, very close to her palm.

Factual error: At the end of the scene where Bert is a one-man-band, he smashes a cymbal on his forehead at the end of his song. The cymbal could not make any sound as he is holding it with both hands, preventing any vibration.

Revealing: When the rooftop dance sequence begins and 3 of Bert's pals appear to shoot out of 3 round smoke stacks, they are actually coming from behind the stacks. (Time)

Revealing: In the scene with the queue of Nannies, and the chimneytop scenes, the wires holding the actors can be seen clearly.

Continuity: When Mary Poppins ascends to join the others for tea at Uncle Bert's house, she starts with her purse clasped in her hand. As she ascends, the purse is suddenly draped over her arm.

Revealing: When Mary is taking the things out of her bag when she arrives, she takes out a large floor lamp. You can see the lamp's post coming up through the bag and the table as she pulls it out.