when the crook throws a knife at Moe, the knife is seen sticking into the supposedly stone wall. Knives do not pierce real stone walls.
When Shemp and a disguised Angus are fighting over the blanket. Shemp actually pulls up the sheet instead of the blanket.
When the Stooges chase after Lorna holding the valuables, they bump into the bedroom door, closing it shut. Moe can even be seen yelling at Larry and Shemp as a result of this.
When Shemp is knocked unconscious to the floor by a marble that was up against the bedroom door, a spiked club accidentally falls off the wall.
Bagpipe music is playing in the main hall and Moe is dancing with Christine McIntyre. Although there are no doors between the main hall and the hallway on the second floor, when Larry hobbles from one room to the next on the second floor, in the same scene, no music is heard.