Continuity mistake: In a close-up of Wile E Coyote's card, the card has "Wile E Coyote Genius" written on it, although in the previous shot the card was completely blank.
Continuity mistake: When Bugs tells Wile E Coyote there is something wrong with his rabbit stew, Bugs is holding a carrot in his left hand. When Wile E is stuck in the hole and Bugs sticks the pressure cooker on him, the carrot Bugs was holding earlier has disappeared.
Continuity mistake: When Bugs comes up from the elevator and finds Wile E Coyote at the door, he is holding a carrot in his left hand. Wile E then hands him his card and Bugs takes the card with his left hand but the carrot he was holding earlier is nowhere to be seen.