Continuity mistake: When Bugs hands Steve Brody a card, Steve is holding a knife in his right hand. But when Steve takes the card from Bugs, the knife has gone.
Continuity mistake: When the turtle who says he is "The Man with 1000 Voices" is standing at Porky's desk, you can see he has his hat in his hand, but in the next shot he is wearing his hat on his head.
Continuity mistake: When we first see Bugs at the Opry House, you can see behind him there is a pink poster with "Frizby the Magician" on it, and on the left there is a yellow poster. But when we see Bugs in the next shot, the "Frizby" poster is now yellow, the poster on the left is now red and a "World's Strongest Man" poster has appeared on the right.
Continuity mistake: Throughout the cartoon, Giovanni Jones's hair is blonde, but when he emerges from the rubble at the end of the concert, his hair is now reddish.