In the scene where Bobby is having his birthday party, there is a band playing a song onstage in Bobby's family backyard. The singer of the band is singing the song, but during the song he is dancing in circles away from the microphone, and his voice is still singing the part of the song, "La Duh Da Duh Da".
When Bobby's dressing after his second night with Terry he buttons his shirt. When he kneels next to her bed his shirt is unbuttoned.
After Terry first swims she covers her head with the hood from her robe. When she turns the corner to enter her room the hood is down and her hair is now dry.
When the guys pull up to Zig's restaurant, they park in front and they all get out. The car is later seen in the parking lot in the rear.
The film is supposed to take place during the summer in Southern California, yet when the boys are waiting for the waitress in the diner parking lot, you can clearly see the vapor of the actors' breath.
In the lingerie store scene, a crewman with a mustache can be seen in the top-right corner of the mirror behind Bobby while he's talking to the shopkeeper.