Just before Kelly and Tiffany are in the office following the car accident when Tiffany's car was totaled (the Pinto) which is confirmed by Kelly, the car is seen outside the office perfectly all right.
When Sally is talking to the Angels at her apartment, she's wearing light brown, heavily-lined lipstick with a gloss coat. When the Angels leave, Sally turns around to talk to Joe and is now wearing a raspberry-colored lip gloss and no liner.
When Tiffany is driving Kelly to the movie theater, they're listening to Bess' cassette. As the song starts, Tiffany's car makes a right turn onto a busy road and it's very obvious that only one person - the driver - is in the car. As the car passes Red Carpet Realtors, it cuts to interior shots of Tiffany and Kelly for 20 seconds, then switches back to the exterior shot - picking up from the exact spot the car was in before the switch to the interior.
When Tiffany's car is pushed down the cliff, a lot of dust is stirred, hitting the front windshield in the long shots, and completely covering it up. Their windows were open. Yet, in the closeups, both Tiffany and Kelly's faces and clothes are completely clean.
In the opening scene, Seth Jeffers smashes a poster display case in front of an adult cinema and rips down - in pieces - a 2' x 3' color poster, which he crumples and flings at the theater's manager. Kelly later retrieves the crumpled poster from the ticket seller but it's now whole and has become an 8 1/2" x 11" black and white flyer with different text, lettering, and photo. Additionally, when Kelly first has it in her hands, it's printed on yellow paper, with "Sally Storm" in handwritten block letters across the top. In the close-up when she shows it to Tiffany, and again later at the office, it's on white paper and the text is all in type.