There is a bad edit at 7:20 when Harry and Kelly are in the school hallway looking at an old photo of themselves. In one shot Harry holds the photo out, then immediately after the photo disappears, Harry has his hands in his pockets and Kelly's arms are crossed, revealing she also doesn't have the photo.
In the opening sequence, during the shots of Dixon in the van, the sliding door beside him is not properly closed... and they are supposed to be driving down the highway.