Blooper

Paper suddenly appears in the typewriter when Helene is writing to Frank about the diary.

The words and action in the live shot of Helene's arrest are different from that of the version she watches later on TV.

When Helene goes shopping at Willie's, she first carries her bag in her right hand and the shopping basket in her left. In the next shot, she carries the basket in her right hand.

After Helene is arrested and she returns to her apartment building, she puts on her glasses as she goes to her mailbox. As the scene continues up in her apartment, she puts her glasses on again as she opens the mail.

When Helene is watching Game 7 of the 1955 World Series with a group of people through an appliance store window, Dodger Sandy Amoros makes a fantastic catch of Yankee Yogi Berra's fly ball. As the scene ends, the announcer says "And the Yankees still lead." The Yankees never led in that game. In fact, they were shut out by the Dodgers, 2-0, losing the game, and the series.

Anne Bancroft was definitely not a typist. For every stroke of her left index finger, there are at least six strokes with her right, and she never hits the space bar. As the page is scrolled up, row after row of letters with no spaces can be seen.

When Helene is at the dentist's office, the dentist pulls out an old style cable driven drill, but when he starts to work, the sound is the high-pitched sound of the much later turbine drill.

The Columbia University sit-in at Dodge Hall by the Students for a Democratic Society (SDS) took place in February 1967, not January 1969 as depicted by in the film.

In a street-shot near the funeral, there is a view of some houses with UHF TV aerials, though UHF TV broadcasting did not start in the UK until the mid 1960s.

As the car drives away with the wedding party, the camera and cameraman are seen in the car window.

Helene says that she wishes Geoffrey Chaucer had kept a diary of his time in the court of Richard III. Chaucer served Edward III and Richard II, more than 150 years before the reign of Richard III.

Toward the end of the movie, Helene Hanff says that "it would have been worth learning Old English to read Chaucer". Chaucer did not write in Old English, he wrote in Middle English.

Frank refers to "the complete Braybrooke edition" of Pepys' Diary. While he may have meant that no part of the Braybrooke edition (there were actually four Braybrooke editions) was missing, none of the Braybrooke editions is by any means a complete Pepys' Diary, and so Frank shouldn't be surprised that excerpts are missing. (This error also exists in the book.)