1. In the Untold History of Mad Magazine, it says that in May 1956, "Disneyland Opens and Mad is there." Disneyland opened in 1955.

2. Also in the Untold History of Mad Magazine, it mentions an August 1997 cover involving Ellen Degeneres. Look at the actual picture of the cover. It says Aug. 1977.

3. In The Lighter Side Of..., in the thing about Business, the boss talks to the worker about the rules and tells his to break them. The second part says, "No go out there and break them." The "no" should be a "now".