When Vince, Eric and Ari meet with the president of Warner Brothers, Vince calls him "John" (saying "I'm all about family, John.") The president character has always been named "Allen".
In the lunch scene with the boys, Shauna and Marvin, a blond in a red dress and a brunette with a purse walk behind Drama. In the next shot the same two girls walk behind Turtle, who is sitting to Drama's left. In actuality the girls should have been out of sight, walking behind Drama's right.