Continuity: The father tears the children's advert for a nanny up into 8 pieces, but when it comes out of the chimney it's in far more bits.

Factual error: The Robin that comes along in the movie is an American Robin, not a British Robin.

Continuity: At the beginning when Mrs. Bank is talking to Katie Nanna you can see the clock behind her and you can clearly see that the time is 6:30 when a little later it is at 6:00.

Revealing: An early scene with the constable and the children, Jane silently mouths along with one of Michael's lines.

Other: In the ceiling tea party, Mary Poppins offers Bert some sugar, and when he responds that he would not like any, his Cockney accent is gone.

Continuity: In the scene where Mr. Banks returns to the bank at night to be reprimanded, look at his torn carnation when it is placed back in his lapel. In each shot, it changes in size, shape and colour at least seven times.

Continuity: At the bank where the elder Mr. Dawes appears from the back room, he makes it as far as the edge of the step in that shot. In the next shot, he's back by the door walking again to the edge of the step.

Revealing: In the scene where all four actors are up on the rooftops, look closely at them when they all step onto the smoke platform that brings them down. All four actors are doubles.

Revealing: In the scene where Mary Poppins is removing the large plant from her carpet bag, Michael inspects the underside of the table, where the table leg casts a shadow across his face. When Mary crosses in front of him (still under the table) she does NOT cast a shadow, although she should.

Factual error: Some of the rockets in which the captain's assistant puts into the cannon have duct/masking tape around them. Duct/masking tape wasn't invented then.

Continuity: At the end of the film, Mary Poppins flies away from the Banks's house (supposedly within a short distance of the City of London), however, she is then shown flying towards the City on a route that would take her over the Banks's house on the way, had she not already flown over it.

Continuity: In the beginning, when Mr. Banks is calling the police and talking to his wife at the same time, the phone cord changes position between shots.

Continuity: When Uncle Albert, Bert, and the kids fall down from hovering on the ceiling, they're about to land on the chairs. But when the camera view changes, they land on the floor.

Revealing: When Mary Poppins takes the children on an outing to the park, look at the front steps when the front door opens. They are not steps but flat ground painted to look like steps.

Other: As the movie starts out, the mother is going to suffrage meetings (to fight for the right to vote), setting the film in the early to mid 1910's. When they're talking about getting a new nanny, the mother gets a modern ring binder out.

Continuity: In the scene when the kids meet Bert as a pavement artist, he draws a road with a single-arched bridge on his drawing. When they jump into the drawing, the bridge is double arched.

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.

Continuity: When Mary reads the measuring tape after measuring herself the message reads up and down (as shown to the audience), but then the camera shows Mary reading it side to side.

Revealing: During the close-up shots of the ceiling tea party, Bert and the laughing man have shadows on the wall directly behind them. However in most of the wider shots, (which have obviously been shot against a blue or green screen) the shadows are now gone.

Visible crew/equipment: At the very beginning of the movie, when Mary Poppins is sitting on the cloud, you can see the string attached to her bag just as it almost falls through the cloud.