Continuity mistake: When Elvis is at the pool singing "you're so square baby I don't care" watch his guitar player Scotty Moore sitting behind him. They use two camera shots for the scene. In one shot he has sunglasses on, in the other shot they are gone. This happens throughout the entire song.
Continuity mistake: When Fred Astaire and Cyd Charisse are dancing among the parallel bars, her skirt changes to cullottes then back again to an ordinary skirt.
Continuity mistake: When Maggie and Richard Avery leave Professor Flostre's room, she puts a beret onto a statue. About four minutes later, when Audrey runs out the room, the statue has disappeared.
Continuity mistake: When we see the crowd aghast at the wolf's trumpet playing at the House of Sticks, there is a woman sitting with her partner at a table and she is holding a glass in her hand. But after a quick cut to the wolf playing, we return to the crowd and her glass is nowhere to be seen.
Continuity mistake: The character Sid Sorokin sings the song "Hey There" into a dictograph machine. He then plays it back and sings a "duet" with himself. However, the lyrics and melody at the end of the song are different from what he sang into the machine originally.