Continuity mistake: In the Season 1 episode "Bollo", Bob Fossil records Howard saying "Gorilla" on his talk box, which Howard does with a downward inflection at the end of the word. However, every time Fossil plays back Howard's "Gorilla", it has an upwards inflection at the end of the word.
Continuity mistake: In the season 3 episode "Party", during the crowd scenes at the party there is a girl with a blonde bob cut and a pink and black leopard print top who noticeably and dramatically changes places between shots. A good example is when Howard is giving his speech and she is at the front of the crowd, then suddenly appears on the complete opposite side of the room next to Vince's bedroom door, and then appears in the middle of the crowd, dancing.
Vince Noir: Goth Juice... The most powerful hairspray known to man. Made from the tears of Robert Smith.