Trivia: The topless girl at the mobsters' pool party is future "Three's Company" TV star Suzanne Somers.
Trivia: Carl Weathers has an uncredited appearance in the film as one of the demonstrators.
Trivia: Clint Eastwood was initially asked to direct, but declined. Ted Post, who had previously directed Eastwood in Hang 'Em High, stepped into the director's seat. However, interviews with Eastwood have indicated that he and second unit director Buddy Van Horn actually directed more of this movie than Post did, due to a number of creative differences. Eastwood and Van Horn would go on to direct the final two entries in the Dirty Harry series, Sudden Impact and The Dead Pool, respectively.
Trivia: After Lou Guzman is killed by a police officer, we cut to a scene where Charlie McCoy is confronted by the officer who shoots him dead in the process. In this scene McCoy was played by another actor as Mitchell Ryan was too ill to film his death scene.
Chosen answer: The error didn't necessarily start with the makers of the credits. It could have crept into the process at any point. Whoever typed up the names to give them to the technicians who made the credits could have misspelled the name.