Corrected entry: At the end of the movie, Julie finds out that the card her, Courtney and Marcy had made for Liz the previous year now has a voice recording of Courtney saying "I killed Liz, I killed the teen dream, deal with it." Which they continue to use against Courtney at prom. However, when Courtney actually says this in the beginning when they are making her look like she was raped, no one is holding the card, Julie put it down beforehand, because in the shot after she says it, Julie is not holding the card anymore.
Corrected entry: When the girls are standing in the doorway of Liz's bedroom, talking to Fern (she had stopped by to drop off Liz's homework assignments), Courtney thrusts out her arm, stopping Julie as she steps forward. Here, her strap falls down to her shoulder. The shot switches to Fren, then back to Julie, her strap is back on her shoulder, as if it had never moved.
Corrected entry: In the scene where Julie, Marcie, and Courtney are sitting outside talking about what to do with Liz's body, Julie takes her sunglasses off of her face and holds them in her hand. In the next shot, about two seconds later, the sunglasses are sitting on her head, with the earpieces tucked into her hair.