Other mistake: I don't care HOW hard it started raining at the end of the final football game, there is no way that the field got THAT muddy and that torn up only 30-45 seconds after the rain started.
Other mistake: In the scene where Jesse enters Monica's apartment, he consults her calendar to see in which class she is in school that day. There's nothing unusual about this until you look closely at the calendar and see that time time is early/mid August. Did her school's academic year run differently from other schools' years, or was she taking summer classes? The latter doesn't seem likely.
Other mistake: The place where Alex drops the needle onto the record is almost immediate, but there is a pause as she steps out onto the dance floor, when the music should have started.
Other mistake: At the beginning of the film, the car with three wheels enters into the car park of the race track. You can see where the brake disc has gouged out the tarmac on an earlier take.