The camera man is seen in the glass reflection when Derek is mixing the paint in the house.
The original Cool Cat performer Jason Johnson is credited in the closing credits as "Jason Jonson".
Various errors in this movie are left-overs from the original editing of the "Cool Cat"-movie, including continuity errors on Cool Cat painting and drawing the "Trolly"-cover, Maria's bullying towards Butch, the locked car with open windows, Cool Cat not looking both ways before crossing the street etc.
Various audio errors during the movie can be heard due to the re-dubbing of Cool Cat's voice, e.g. when the background sounds at the Hollywood Parade disappear.