The Griffins' stove shows a digital clock; in other episodes, it's analog.
When Joe falls from the streetlight, the sign across the street for "Quahog Sporting Goods" is misspelled as "Quahog Sporitng Goods."
KISS guitarist Paul Stanley wears a black star over his right eye; it's over his left in some scenes.
Stewie used a pocket knife to sharpen the candy cane to stab Lois. He could have just used the pocket knife.
Joe warns Peter that he'll arrest him if he drives under the influence of alcohol, but he has no problem with open alcohol containers in a vehicle, which is also illegal.