When Debbie receives a phone call about Jim and rushes off in her Mercedes, it has old-style silver-on-black number-plates on the front and back as she is leaving Charlie's house, but a few seconds later, and in all subsequent shots, they are new-style black-on-white number-plates. Also, in a point-of-view shot from the driving seat, the car is moving as it turns into a driveway, but the speedometer reads zero.