Continuity mistake: Towards the end of the episode, Maude makes Walter breakfast and lists some things she will get done around the house. One is to paint the kitchen chairs. She spray paints the chair with Walter in it - the amount of spray paint on Walter's jacket changes thoughout the scene, especially when Maude is on the phone turning down a job.
Continuity mistake: When Mrs. Naugatuck comes downstairs in the maid outfit, she's wearing red shoes. Maude tells her to go back upstairs, and then Arthur tells her to come back down. When she does, she's wearing black shoes. When she goes back up the stairs, she's wearing red shoes again. (00:18:25)