When Ms. Vaughn writes the word love on the blackboard, the writing alternates between two differently written love words in the next scenes.
When Ms. Bannet, Victoria and Pauline are at the black board during the math class, parts of the equation appear without Pauline writing it.
During Paulie's outside conversation with Fay Vaughn on the quad (after Paulie has run into her and scattered Ms Vaughn's books); Paulie's hair changes from shot to shot. In some shots, her hair is brushed back behind her ear while in others she has a spare lock of hair curled in front of her ear.
After Paulie "forces" the blood pact of raptors with Mouse, their palms are both bloody. Just later when Paulie is laying back on bed, her hand isn't bloody at all, while Mouse still holds her palm with other hand.
Mary talks about not knowing what fun was before, "like Dr. Spock," rather than Mr. Spock. She is apparently paraphrasing a statement by the iconic character in This Side of Paradise (1967).