Character mistake: On the train Otto says a 1964 quarter is pure silver. They are actually 90% silver and 10% copper. (00:30:28)
Suggested correction: Most people wouldn't know the chemical make-up of a quarter prior to 1965. They'd just refer to it as a silver quarter, not realizing it's partially comprised of copper.
Continuity mistake: At 00:41:28, When Otto sits in his car, the steering wheel has no logo of the car's brand, but later on 01:08:45 the car's brand (Chevrolet) is visible when Marisol drives the car. (00:41:28 - 01:08:45)
Continuity mistake: Near the end of the movie, when Otto is holding the baby, the baby's hat is on and off in between shots. (01:48:48)
Other mistake: Among the credits for the film's music are "principle first violin" and "principle second violin." The correct word is "principal."
Other mistake: If Otto's wife was in a wheelchair for 40 years, why did the house not appear to be handicap accessible? Otto hadn't touched anything in the house after her death, but the only noticeable building alteration was the low counter top in the kitchen. No permanent ramps? No stair lift?
Other mistake: The movie begins with Otto buying 5 feet of rope. It turns out that the intended use was for him to hang himself. No way the hangman's noose we see was made from 5 feet of rope.
Factual error: In the flashback where Otto gets on the train with Sonia, you can see the familiar Pennsylvania Railroad red keystone logo on the side of the railcar (or engine). The scene is approximately year 1972 (born 1955 from tombstone; Army physicals were age 17/18), and stated as in Pittsburgh. His ticket was $1.10, implying a short ride. But PRR ended commuter service in Pittsburgh in 1964. Moreover, PRR was merged into NY Central in 1968, so by 1972, the logo would have been Penn Central's green "PC."
Continuity mistake: Near the end of the movie, when Otto brings over the crib, the baby has a hat on. When Otto says he gave it a fresh coat of paint, it cuts to Marisol who says "I love it," and the baby's hat is missing.
Continuity mistake: The baby appears to change size from when its mother is holding it to when Otto holds it. The baby is bigger at first.
Revealing mistake: When Otto, Tommy and Marisol find the frozen cat outside of the house it is a puppet prop. A few seconds later Tommy is holding it now back to a real animal and is bone dry.
