Revealing mistake: In the parade scene, not only are people wearing long hair and bellbottoms, but late '70s vehicles can be seen passing or parked in the background. Also in one shot, behind the marching ROTC, a camera rig can be seen in front of spectators photographing the parade.
Revealing mistake: In the scene where Babs is writing down what is said during the Fraternity's disciplinary hearing, (Court reporting) no ink is actually coming out of her pen as she writes on her notepad. That is, the notepad remains blank even as she turns to a new page while writing. (01:04:50 - 01:05:55)
Revealing mistake: During the scene where the Delta boys are looking at slides of the recruits from the evening, Otter steps in front of the screen to defend Flounder. Notice that he is standing directly in line with the projector to the screen and there is no shadow on the screen nor is part of the slide projected onto his chest. (00:14:10)