Stan has a loose tooth that "buzzes" after he speaks, unless he holds it down, but in the school room he is able to sing without it buzzing, despite not holding it in place.
Right after Stan and Ollie escape prison, they are still visible in the prison court yard.
In the prison yard, Stan and Ollie approach a group of singing prisoners. As they approach, Stan's outer shirt is buttoned up, but Ollie's is not. The next camera shot is a close up of just Stan and Ollie, and suddenly Ollie's shirt has two buttons fastened.
The cotton pickers get out of the field twice.
During the breakout, Ollie winds up with a Tommy gun. even though he was under suspicion by the "Tiger" and shouldn't have even been close to a weapon. The gun has a telescopic sight on it, something a sub machine gun would have never had, owing to the high rate of fire and the propensity of the weapon to "climb" while being fired.
The camera is positioned too low during Stan Laurel's dance in the "Lazy Moon" sequence. At several points Stan's head is partially or completely cut off by the top of the frame as he leaps in the air.
The boom mic, the lighting and the cameras are reflected on the warden's car as Stan and Ollie are fixing it.
The lighting rig shadow can be seen as the migrant workers exit the cotton fields.