Corrected entry: The amount of sleep medicine that Edgar put into the cats' cream would have killed them. He empties the entire bottle of sleeping pills into their cream.
Corrected entry: While Berlioz and Marie are singing "Scales and Arpeggios," Toulouse, paint all over his paws, jumps up on the piano and plays a couple chords as Berlioz plays the melody. Paint gets all over the piano keys, but when Toulouse jumps off the piano, the keys he played are spotless.
Corrected entry: When Edgar is boasting to Frou-Frou about his catnapping achievement, he unfurls a newspaper. If you observe carefully, you will see that the newspaper title "Le Journal de Paris" is in French but all the articles are in English.
Corrected entry: Scat cat and his gang of alley cats comprise five cats - Scat cat, the Russian cat, the English cat, the Spanish cat and the Chinese cat. However, at the end of the song "Everybody wants to be a cat", when the alley cats are dancing their way into the steets of Paris, there are eight cat silhouettes.