Other mistake: In the scene where an unemployed Ted Kramer character is in the offices of another advertising firm negotiating with two executives for a job, he tells them he will take a pay cut if they hire him but that this is a one-time offer. The executives are reluctant to make a decision because supposedly, it is Friday at 4:30 p.m., the weekend before Christmas. However, the shot through the window behind where Ted is sitting shows a bright and sunny New York City, probably at high noon since there are no building shadows. If it were really 4:30 p.m., the city would obviously be much darker, particularly in late December. Also, given the greenery that can be seen, it is probably not even winter.
Continuity mistake: In a scene in the restaurant, the rose on the table in the vase goes from a small rosebud to a fully blown rose and the petals are ready to fall off.
Trivia: Owing to the film's success, many jurisdictions abolished the "tender years" doctrine in divorce law, which gave custodial preference to the mother.
Ted Kramer: Margaret, I just need to know something. Did you put Joanna up to this?
Margaret Phelps: No, I did not put Joanna up to this.
Ted Kramer: Give her a little pep talk, maybe?
Margaret Phelps: Joanna is a very unhappy woman and it took a lot of courage to walk out this door.
Ted Kramer: How much courage does it take to walk out on your kid?
Billy Kramer: When's Mommy coming back?
Ted Kramer: I don't know, Billy. Soon.
Billy Kramer: How soon?
Ted Kramer: Soon.
Billy Kramer: Will she pick me up after school?
Ted Kramer: Probably. And if she doesn't I will.
Billy Kramer: What if you forget?
Ted Kramer: I won't forget.
Billy Kramer: What if you get run over by a truck and get killed?
Ted Kramer: Then Mommy will pick you up.