In the Dull Life of a City Stockbroker sketch, the poster on the back of the bus differs when the stockbroker gets on the bus and when he alights from the bus.
In the sketch Crunchy Frog, the proprietor of the Whizzo Quality Assortment proudly claims that his product contains no artificial ingredients. Later, when pressed on the ingredient Lark's Vomit, he states that monosodium glutamate is one of the other ingredients listed on the label on the bottom of the box.
In the Dull Life Of A City Stockbroker sketch, when he reads the comic book, the word "handkerchief" is missing the letter "k".