Continuity mistake: When the brunette is in the shower and that boy shows up he is wearing brown pants, but when you see the clothes lying on the carpet while they are in bed together, the pants are blue jeans.
Continuity mistake: When Randy shows up at the Health Food Store where Julie is working, Julie is wearing Levi's. In the next shot, she is wearing light blue pants.
Continuity mistake: In the scene in the diner Julie's friends are telling her Tommy wants to take her back, Stacey enters with school books close to chest and sits down. The next shot shows the books on the table, and the following shot shows books back against her chest.