• When Brian and Stewie are finding diversity in the Ambercrombie and Fitch catalog, it first reads "Catalog", but after the cutaway, it reads "Magazine".
  • The basso singer of the barbershop quartet is blond for the beginning of "Vasectomy", but for one close up shot of him shortly after Peter asks 'But how is it done?', he has ginger hair, but in the next shot of him when he pokes his head under the chair, he is blond again. When the quartet is leaving the room, the black-haired singer's hair color changes to brown.

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