During Professor Jennings' lecture on Milton, the handwriting for the word "Satan'' on the chalkboard change from scene to scene.

The letters on the Delta house balcony change from "DXT'' to "DTX'' and back again while it is being gutted by the authorities.

Flounder Drives a 1964 Lincon even though the movie is set in 1962.

The movie, set in 1962, features "Louie, Louie", which did not come out until 1964.

The letters of SIGMA SIGMA change during the parade - the second "A" was knocked off by the fire hydrant and re-appears.

As Bluto falls from his ladder while peeping on Mandy Pepridge at her Sorority house, you can see the pads cushion his landing.

Watch the golf club be "passed" between Otter and Boon during the ROTC meeting.