Continuity mistake: When Molly Ringwald is on the phone at the club and gets approached by the girl in orange, throughout the whole conversation the position of the phone receiver in Randy's hand is wildly inconsistent. (00:09:30 - 00:11:00)
Continuity mistake: During the scene when Bobby's auditioning for a part, there's a picture on the wall of Helen Martin (the lady playing Bobby's Grandma). The picture disappears and reappears during the scene.
Continuity mistake: When Frances takes Helen to sleep in the car, he puts her in the back seat from the drivers side. In the morning the camera is looking at her through the the window of the door on which she appears to be leaning. Yet when she gets out of the car later in the scene, there is a canvas draped over the door way.
Continuity mistake: When Tiger kicks the trunk, making it slide across the floor toward Dragon, the trunk hits the door and comes to a complete stop while the door opens. In the next shot the trunk has suddenly moved about 6 inches in the door opening. (00:29:40)
Continuity mistake: Rowdy's thumb position on the sandwich box changes between the first and immediate shot.