A scene of the "Let It Be" sessions shows John and Yoko waltzing to the unfinished track, while Paul and George argue over the last two notes of George's solo, leading to George's walking out of the studio. Waltzes are in 3:4 time; "Let It Be" is in 4:4, and the couple in real life danced to "I Me Mine" (written in 3:4). Paul and George's "last two notes" argument was over a break in "I've Got A Feeling", on another day.
John Lennon's spectacles did not fall to the ground when he was shot. They were deliberately removed from his face by Jay Hastings, the doorman who came to Lennon's aid.
The final scene shows John facing his killer when in fact he was shot in the back.
May Pang is portrayed as having a Chinese accent. In fact, she grew up in East Harlem and has a pronounced New York accent.
John's hair is shown at shoulder-length for most of the early 1970s portions of the movie. In fact, John's hair was usually collar-length through these years, and he spent much of 1973 with a buzz cut.
John is shown playing his own piano accompaniment on the song "God", in the recording studio. The piano on the record was actually played by both Billy Preston and Lennon.
When John and Yoko are leading everyone in singing 'Give Peace a Chance' John is shown fingering a D chord on his guitar but the song is being played in E.
Scenes taking place in New York in June 1971 incorrectly show the World Trade Center in its completed form, where it should have been under construction, as it hadn't been opened to the public until 1973.
During the January 1969 scenes, Paul is shown listening with George his guitar solo on "Let it Be". That particular solo was recorded on January 1970, one year after the scene depicted.
Paul is shown with a mustache as late as mid-1968. In reality Paul shaved his mustache by the autumn of 1967 (he was clean-shaven for Magical Mystery Tour)
While recording Sergeant Pepper's Lonely Hearts Club Band, John invites Yoko to "Abbey Road Studios." The studios were known as EMI Studios until the 1970s, when they were renamed in honor of the Beatles album of the same name.
A 1969 scene shows Lennon and McCartney and their wives talking about signing with Allen Klein. In this scene, John says that "Let It Be" (the documentary) was a waste of time. However, by this point, the documentary was known as "Get Back". It wasn't until the first months of 1970 that the documentary changed its name, and by that time, Lennon had already quit the band.