Factual error: Cher complains that Astroturf is going to ruin baseball. Mermaids is set in 1963 when Astroturf was still being developed under the name Chemigrass. It wasn't christened Astroturf until it made its world debut on the floor of the Houston Astrodome in 1966.
Factual error: One of the first races that Cole runs is Phoenix. Phoenix International Raceway is a very flat track. There are several shots in that segment showing a high-banked oval.
Factual error: Banker Carl (Goldwyn) threatens to kill Molly at 11 pm if he doesn't get his $4 million. Goldwyn goes searching for his money at Whoopi Goldberg's house. Goldberg is arguing with her sisters over whether to watch The Arsenio Hall Show or change the channel to watch Love Connection. In New York, where the movie takes place, The Arsenio Hall Show was on at 11:30 pm (already past the time he threatened to kill Molly) and Love Connection was on at 9:00 am and both shows were broadcast on the same channel.
Factual error: During the second half of the film, set in Britain, Peter Mitchell is hiding away from a woman. She opens the door and asks "What are you doing in my closet?" She seems to talk with an upper class British accent, but she wouldn't use the American word "closet," but use either "wardrobe" or "cupboard."
Factual error: Bob shoots Nikita in the knee to prevent her from doing anything drastic. However her leg heals really fast, without any medical help and no scars at all. (00:19:00)
Factual error: When Robert Redford looks at the radio he finds in Lena Olin's car, the radio's ID plate has a serial number beginning with 67-, which means it was paid for by the U.S. government with funds from fiscal year 1967 - eight years too new for a story from late 1958.
Factual error: In the time Cry Baby is based, there was racial tension (the judge even makes a racist remark). The jails would have been segregated until 1965, yet when Cry Baby goes to jail, both white and black people are in the scene. That would only ever happen during rec time and meals.