In one shot in the radio station (when the accordion player is there), the sign on the desk is misspelled: it says "Jack Bunny and his amatuer hour". Although, in the other shots, the error is corrected.
At the radio station when the manager is handing out the trophy, the trophy shifts in the animation because something on the desk is in the way.
In the beginning, the father's name is given as Prof. Fritz Owl, with Owl being the surname. When his son hands his card to the radio host, his name is listed as Owl Jolson, with Owl being the given name. (It's still a funny gag.)
The call letters of the station (GONG) are invalid for a U.S. station. For stations to the East of the Mississippi River, the first letter must be a 'W', while those to the West of the river begin with a 'K'.