Continuity mistake: When the man pulls the curtain rope at the theatre and breaks it, the bucket on a hook on the wall changes position between shots.
Continuity mistake: When the frog finishes performing "Michigan Rag" outside the talent agency, he throws away his cane. When we see the frog singing "Come Back to Eireann" after he and the man were thrown out of the talent agency, the cane has somehow managed to get back into his box again.
Continuity mistake: When the man is sitting on the park bench and the frog is singing, the outside of the newspaper is completely blank, but in a close-up of the frog croaking, writing appears.