About 10 minutes into the movie, when the truck is chasing the 2 college students in the car and starts ramming them, the bumper and the trunk is smashed in. The shot changes and shows the car's rear end and it is in perfect condition. This repeats at least 3 times.
In the final shot, the Creeper's eye looking through one of the holes of dead Darry is Justin Long's eye. (Confirmed on the DVD commentary).