Was the focus of a short and bitter flurry of allegations between Warner Brothers and MGM of plagiarism over similarities between this film and WB's
Rhapsody Rabbit (1946). The controversy began when raw film from "Rhapsody Rabbit" was sent to be processed at a central film lab which serviced both Warners and MGM. By accident, the finished negatives were sent to MGM, who eventually returned them, but
Friz Freleng (the director on "Rhapsody Rabbit") suspected that Hanna and Barbera or others at MGM may have viewed the film before sending it on to Warner Bros. Hanna and Barbera counter-charged that Freleng had somehow overheard their ideas for "The Cat Concerto" and acted on it.
