When Jack is being shaved by the salesman Petronius Smith, he starts out using a straight razor with a white handle and a long blade, but suddenly it changes to one with a black handle and a short blade between shots.
At about 00:09:40 as Kate is feeding Big Jack from a bowl with a spoon, before Marjorie Main can get the spoon to Wallace Beery's mouth the third time he mistakenly puts his lips on the bowl instead of the spoon.
As Jack and Kate are talking when he is on his way to the barber to get surgical instruments for Dr. Meade, a shadow of the camera falls across the back of a passer-by they greet.