The names of the Stooges' fiancées change. When the Stooges first arrive at the ladies' house and address the ladies' names, June Gittelson is Corabell, Marcia Healy is Florabell, and Betty Mack is Dorabell. Then a little later in the short when each Stooge draws one of the women's names from the hat, June is suddenly Florabell, Betty is Corabell, and Marcia is Dorabell! Further complicating matters, when Marcia is knocked out by the cement block, Curly calls her Corabell... Marcia played all three girls.
The flow of water changes after Moe takes his finger out of the opening of the water pipe.
The length of the rose that the Stooges dog carries in his mouth changes from long when we first see him in the wagon to shorter when he meets the female dog at the doghouse.
When Moe and Larry are raising a wooden 2x4 wall they built, Moe asks Larry to get something to brace up the wall.
Just then a car can be seen driving from right to left in the background.
When they show Larry grabbing a piece of wood with nails in the end, the car in the background has disappeared.
When Curley gets knocked out, with his feet in the wet cement, there are concrete rocks and fragments on the ground behind him. When he awakens with his feet in the hardened cement, and starts chopping his feet out of the cement, the rocks and fragments are gone.