(at around 1h 5 mins) When Angela covers a tambourine with a cloth and props it up on a chair, the cloth slips off the tambourine. When the view then cuts immediately to a long-shot, the cloth is back in place on the tambourine.
In the number where Charlie is a streetcar driver, they pass the same businesses twice in some shots. And, in one shot, the tracks for the streetcar lead oddly back into a curb from the direction the streetcar came.
When Charlie is dancing on top of the Washington Square Arch, a few of the flying birds cast shadows on the painted backdrop.
During the "Currier and Ives" segment, Charlie Hill and Angela Bonfils are skating on a frozen pond in the "Winter" sequence. The refrigerant pipes for freezing the pond are visible under the ice in several shots.