Continuity mistake: There is a scene in the movie where the Beatles enter a limousine, I believe at the beginning of the movie. In this particular scene the Beatles are all dressed in suits and ties, but when the Beatles are filmed in the limo, John Lennon is wearing a turtle neck sweater beneath a blazer.
Continuity mistake: While looking for the canteen, George inadvertently wanders into a production office. The receptionist takes George in to see Simon, who believes George is there to audition for a testimonial for those "dead grotty" shirts. While the receptionist is sitting on Simon's desk, her legs are straight. After Simon says, "Because he isn't wearing one of these nasty things", her legs are instantly crossed.