The fire hydrant in front of the courthouse keeps changing locations. Early in the show, it is a few feet away from the pole with the white stripes. Later, it appears to be right behind the pole. In the last scene, it appears to have disappeared altogether.
In the closing scene, Barney tears up the ticket that he wrote Bob Rogers, from the State Attorney's Office, for parking illegally and throws it on the ground. There were at least two other episodes in which Barney wrote tickets for littering.
In the first wanted poster scene, in frustration, Barney files a poster of a criminal that had already been caught. In the next scene, when the temporary deputy is at the wanted poster board, the previously filed poster is back in its original spot on the board.
When Barney Fife stands on Emma Brand's porch in an attempt to sell a vacuum cleaner, the lighting on him is obviously adjusted.
The wanted poster Barney removes from the bulletin board is back the next day.
At the last break, when Andy asks Bob Rogers about the Green River Ordinance, Bob calls it "Green Wivver".
In the scene right before Barney's arrest, Andy parks his squad car right next to a fire hydrant, which is obviously against the law.
According to Bob's statistical crime chart, a wife-beating will occur. Sure enough, one does, and Andy has Barney hand over the keys to the squad car so Bob can head out and handle it. Bob leaves immediately, knowing only the name of the assailant, but nothing about where to go.
Barney is well known for being a stickler about writing littering and jaywalking tickets, yet, in less than a minute, during the closing scene he commits *both* crimes himself. First he tears up the ticket he'd given Bob Rogers and throws it on the ground. Then, after Bob drives away, he jaywalks across the street right in front of the courthouse.