Other mistake: Just one second after Bugs puts a letter (presumably an order for a pair of earmuffs) into a mailbox, a courier arrives with a package containing the earmuffs.
Long-Haired Hare (1949)
1 other mistake - chronological order
Directed by: Chuck Jones
Starring: Mel Blanc, Nicolai Shutorov
Continuity mistake: When we first see the concert hall at Giovanni Jones's concert, you can see that there is nothing on the left of the hall, but when Giovanni appears on the stage, a tree in a pot has appeared.
Bugs: Of course you know, this means WAR.
Trivia: Before Leopold (Bugs) begins conducting, he takes the conductor's baton and breaks it. Leopold Stokowski never conducted with a baton, so this is the reason why Bugs breaks it.