Continuity mistake: In the long shot of Sister Bernice as a lifeguard at the pool, she is twirling a whistle with her right hand. But in the close-up shot of her a moment later, the whistle has gone.
Continuity mistake: When Curly, Larry and Moe are talking to Teddy on the bridge after the car explosion in the lake, the amount of dirt on Teddy's face changes between shots.
Continuity mistake: In the scene where the three stooges are driving the golf cart and round the corner the handle from the lawnmower is extended and knocks over the ladder with the Nun. The next shot shows them getting out of the cart and the handle is no longer sticking out of the side of the cart.
Continuity mistake: The bell falls from the roof onto Sister Mary Mengele and knocks her out cold. She falls to the ground and there is a metal bucket about three feet from her head. When Moe and Curly grab her under the arms and slide her further away from the building, there is now a fire hydrant with a tuft of grass that her head is banged against.