During the trial proceedings, a Black juror was in the first row, but the trial scene following the argument between Amanda and Adam where Adam walks out of the home, the jury makeup has now changed and the Black juror is not present. However the following day when court resumes for the jury verdict, the Black juror is back in the jury box.
When Olympia lifts Adam in court, Kip jumps out of his seat and races forward, laughing. In subsequent shots he is alternately standing/sitting.
When Doris is watching her husband crossing the street; she is hiding between two parked cars. But on the next cut when she steps out to follow him to the building of his lover; there is now only one parked car and it is a different model and make from the aforementioned parked cars.
When Doris' husband falls when she shoots him, he knocks down a ballerina figure that was on the fireplace mantel, but in the following cut when she shoots at his lover, the ballerina is still on the mantel.
As Doris is waiting for her husband to come out of work, she drops the newspaper she is holding. In front shots she is still holding it. In side and rear shots she isn't.
In the courtroom Kip and Emerald are sitting right behind the prosecutor's desk and in front of the rail separating the gallery from the lawyers' section. But in a real trial they would not be allowed to sit there because that section is reserved for official members of the court. Although they are personal friends of Amanda and Adam, they are not there in any kind of official capacity.
Although Adam and Amanda are reading about Doris Attinger's arrest in different morning newspapers (he the "New York Globe", she the "New York Chronicle"), both papers' back pages are identical.
When Adam is "lifted" in the courtroom by the circus woman, the wires that actually lift him are plainly visible, even on a TV screen. They continue to be visible as he is lowered down.
Early in the film, while driving down a New York street, Amanda wildly turns the steering wheel from one side to another but the car moves straight ahead.
When Amanda gets off the massage table, a brief glimpse of the costume she is wearing under her towel can be seen.
When Adam slams the door as he exits their apartment after an argument, he slams the door and the wall shakes. As Amanda slams the door after him in anger, the door frame can be seen to be coming apart, revealing that it is a set, not a real apartment.
When Kip is playing his song for Amanda in the Bonners' apartment, his foot is on a foot pedal that raises the dampers, but the sound heard is quite different.
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.
Midway through the trial, Kip uses the Bonners' 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 reportedly become a big hit.
Amanda gives Adam a cocktail she identifies as a "daiquiri", but it is as absolutely clear and colorless as water or vodka. Daiquiris are always cloudy to opaque because they contain fresh citrus or other fruit juice.
When Adam and Amanda are having their first serious argument, Adam says to Amanda, "You think the law is something you can get over, or get under, or get around, or get...or just plain flaunt." Flaunt means to ostentatiously display something. (Success, finery, possessions, etc.) The verb he should have used is "flout," which means to openly disregard something. (A rule, a directive, a law, etc.)