Jerry says he is thinking of getting a yoyo but several episodes before he is seen playing with a yoyo.
You don't get arrested for parking in a handicap spot, you just get a fine.
The car would have been towed out that spot right away after the incident.
After Frank's car is demolished by the angry mob in the parking lot, he tells George that he had that car for 8 years, and that he custom ordered the bench seat in the front, meaning that he must have bought the car brand new. The car is a mark 1 Ford Granada, which was made from 1975-1980. If he bought it in 1980, and had it for 8 years, that would make it 1988. The episode took place in 1993, which means the car must've been at least 13 years old, so he couldn't have custom ordered it 8 years before.
When they are considering parking next to the fire hydrant, all the cars in the parking lot have California license plates.
When Frank first learns about the car, as he walks out of the kitchen you can see the reflection of the boom mic in the cabinet's glass.