Trivia: This was the last cartoon in the original Merrie Melodies series, ending a run that had continued since 1931. It was also the 1,000th cartoon short released by Warner Brothers.
Trivia: After Bluebeard eats all of the "Popovers", he opens a medicine cabinet. In the cabinet are bottles with references to several Warner Brothers staff: "Frizby Miniatures" (Friz Freleng), "Maltese Minestrone" (Michael Maltese), "Ted Pierce's Medicine" (Tedd Pierce), "Dr Foster's Panace" (Warren Foster) and "Jones Laxative" (Chuck Jones).
Trivia: There is a sign at the "Henry the Eighth's Fifth" advertising "Selzer's Water" - a reference to the Warner Brothers producer Eddie Selzer.
Trivia: When Ralph is raiding the fridge, you can see a bottle of "Pierce's Beer" behind him. This is a reference is the cartoon's story writer, Tedd Pierce.
Trivia: "The Music Box" won the first Academy Award for Live Action Short Film in 1932. It was also the only Laurel and Hardy film to be honoured with an Oscar.
Trivia: In the opening title card, you will notice there is no "Story" credit. Michael Maltese was the story writer, but as he had left Warner Brothers for Hanna-Barbera, his name was removed from the credits.
Trivia: At the start of the cartoon, we see animals changing seats in the theatre. This is re-used footage from a 1937 Warner Brothers cartoon, "She Was An Acrobat's Daughter."
Trivia: When Daffy Duck slides down the banister when Mr Meek is chasing him, he turns the statue at the bottom of the banister so that its spear will hit Mr Meek. When he does this, you can briefly see that the shield the statue is holding has the words "Buy Bonds" on it.
Trivia: The final complete "Wallace and Gromit" film to feature original voice actor Peter Sallis before his retirement. He voiced the character in only one other project after - an educational mini-series that featured the character in short vignettes introducing segments about unique inventions.
Trivia: The opening theme for this cartoon was also used in "Zip 'N Snort."
Trivia: When Bobo is running on the baseball diamond, behind him you can see a poster for "Cohen Ties" - a reference to the animator Herman Cohen who worked on this cartoon.
Trivia: The book that Bugs is reading at the start of the cartoon is authored by "Burton" - a reference the Warner Brothers production manager, John Burton.
Trivia: When we see Bugs telling the other cowboys about the acts for the vaudeville show, you can see behind him there is a poster for an act entitled "Frizby the Magician." This is a reference to the Warner Brothers director Friz Freleng.
Trivia: The first Tom and Jerry cartoon in which the characters are named.
Trivia: In the cartoon's opening title credits, there is no "Layout" next to Robert Gribbroek's name, which makes him appear to be an animator.
Trivia: When Elmer finds himself in the year 2000, he picks up a newspaper with a headline saying "Smellevision replaces Television!" Underneath this there is a caption saying "Carl Stalling sez, "It will never work!" Carl Stalling was the music composer and arranger for the Looney Tunes and Merrie Melodies shorts produced by Warner Brothers.