Continuity mistake: When Elmer walks up to the row Bugs and Daffy are sitting in, you can see Bugs is holding a carrot in his left hand. When Bugs says "Who, me?" after Elmer asks him if he was Bugs Bunny, the carrot has disappeared.
Continuity mistake: When Daffy is horrified to see Bugs' name on Elmer's red book and not his, the words "Bugs Bunny" are on the front, although when Daffy took the book from under Elmer's arm, the front was completely empty.
Continuity mistake: When the camera pans in on the audience after Elmer introduces the show, you can see a man wearing a blue suit and red bow-tie sitting in the seat next to Granny. When Daffy complains to Granny about Bugs being the guest of honour and not him, the seat next to her is now empty.