In the scene at the dinner table halfway through the episode, the doorway behind Homer's shoulder leads to the front foyer, and you can see the front door of the house. This is out of sync with the rest of the episodes of the series, where it leads to the kitchen. Later in the scene, the kitchen is seen through the doorway as usual.
Around 15-16 minutes in: Homer's burger goes back and forth from being half-eaten to uneaten between camera angles.
In the courtroom after the road chase there is a shot where Bart's head is missing/transparent for a few frames.