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Continuity mistake: When Mary Poppins starts to read the "qualifications", the paper she reads from is whole, with no kind of indication that it had ever been torn. After a quick cut to George and back to the paper, the closeup of the paper reveals the lines where it was torn. Also in this scene, when she comes in, she has white gloves on. In the closeup on the paper, the gloves are gray, and a few shots later, they're white again.

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Continuity mistake: As Banks realises what the phone call is about, Bert is picking up the last brush. A moment later, he picks it up again.

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Continuity mistake: When Mary holds up the paper, it appears whole, but in close up, the places where it was torn are visible, then whole again.

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Continuity mistake: As the Penguins answer the call, and are setting up the table, Bert is laughing and leaning in, and a second later, he is upright and all the way back in the chair.

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Continuity mistake: When Admiral Boom makes his appearance, and asks about the time gun, he states "Three minutes and Six seconds" until the hour. However, the argument between Katie Nanna, the maid and cook, and Mrs. Banks' "Sister Suffragette" number, and Nanna's announcement of departure take a total of five minutes and ten seconds until the gun is fired.

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