Factual error: Several times during the film a Zildjian stencil logo can be seen on the bottom of a cymbal. Zildjian did not start applying logos until the 1970s.
Factual error: In the scene where Ethan Embry is taking a picture with the Marines, Mickey, and Goofy, the Disney characters are modern characters, and not wearing the same style costumes that were worn in the mid 1960s. When the film was set, the non-black part of Mickey's face was not as round, the bow-tie was orange and had streamers going down the front of his shirt, the collar on his jacket was more fancy and white. In the 60s, Goofy had a larger head, a blue hat, and a green vest. He also had eyelashes which have since been removed from the costume.