Crew or equipment visible: When Adam Bonner is lifted by the woman in court, the wires supporting him are visible.
Continuity: When Olympia lifts Adam in court, Kip jumps out of his seat and races forward laughing. In subsequent shots he is alternately standing/sitting.
Continuity: As Doris is waiting for her husband to come out of work, she drops the newspaper she is holding. In front shots she still holds it. In side and rear shots she isn't.
Revealing mistakes: Even though Adam and Amanda are reading about Doris Attinger's arrest in different morning newspapers (he the "New York Globe", she the "New York Chronicle"), the back pages of both papers are identical.
Continuity: When Adam and Amanda are at their accountant's office, the sign on the outside of the building reads Jules Frick. When they are inside the sign in the window has the correct name Jules Frikke.
Continuity: During the trial, when Adam Bonner is talking to the jury, he makes a few slips of the tongue. You can see Amanda's hand jump to cover her mouth to keep from laughing in several shots, while in other shots her hand is on the table in front of her.
Continuity: When Adam confronts Amanda and Kip in his apartment with the licorice gun, the handkerchief in his suit pocket keeps changing lengths between shots.
Audio/visual unsynchronized: When Kip is playing his song for Amanda in the Bonner's apartment, his foot is on a foot pedal that raises the dampers, but the sound we hear is quite different.
Plot holes: Midway through the trial, Kip uses the Bonner's piano to play an early version of a new song he's writing that is in such rough shape, it doesn't have complete lyrics. Yet shortly afterward - and long before the trial is over - the song has already been recorded, played on the radio and is reportedly a big hit.
Crew or equipment visible: Near the end of the first scene in Adam's office, the reflections of large rectangular set lights can be seen in the framed diplomas lining the office walls.
Revealing mistakes: Early in film, Amanda wildly turns steering wheel from one side to another while driving down straight New York street.