At the beginning of the episode, Barney (Greg Morris), posing as a police officer, is writing down the license numbers of vehicles outside the house of Eve Vayle (Laraine Stephens). When shot from the front, Barney is standing next to a concrete lamppost on a sunlit street, between a dark brown car and a gray one. When the shot switches to a reverse angle from Eve's front door, however, he's suddenly standing on an overcast street between two black vehicles, and the lamppost is nowhere to be seen. Then the shot switches back to a front view as she approaches him, and he's back on a sunlit street.
Previously incorrectly identified as an error: "Mrs Vayle received $100,000 blackmail money, in 4 bundles, which would likely be 25 bills of $1,000 in each bundle. Yet when Willie removes money from the bundles, it is revealed that the bills are $100 each. This means the total would in fact be only $10,000."
There is no goof on this matter. A bundle of 250 $100 bills would be just over one inch thick. This is consistent with how the bundles appear during the episode.
When Jim & Eve enter Marcia's apartment, the shadow from the boom mic can be seen on the wall on the right side of the room.