Continuity mistake: When the seven dwarves run scared down the stairs and out of the door, Dopey pulls the handle of the door from the inside until it breaks out and falls away. The next scene when the dwarf opens the door, the handle is there again. (00:33:00)
Continuity mistake: Once the orchestra falls apart and begin fighting each other, the Lion gets made and begins ripping out his hair. Then some instruments smack him in the face and he falls backwards. It then cuts to a close up of him and suddenly an object, apparently part of the stage props, appears in the background at the top corner. It is not his podium seen in the previous shot. (00:06:40)
Continuity mistake: When we see the projection unit in the projection room towards the end of the cartoon, you can see it has a black door and there is also a small window with gold lines in it, but when the goose opens the door in the next shot, the door is now blue and the gold lines have disappeared.
Continuity mistake: When we are in the lounge of the haunted house at the beginning of the short, there is nothing on the round table, but in the very next shot some playing cards are now on the table.
Continuity mistake: When Porky arrives home, you can see a window looking outside to the right of the front door, but when Porky shoots the man upstairs a second time, the front door now leads to a hallway with a staircase.
Continuity mistake: Goodwill captures four of the pigs and confines them in a pillory, a wooden framework with six holes. The head of each pig is sticking through one of the holes. After Goodwill captures Petunia, Porky enters the laboratory and discovers the pillory. Five pigs are now confined, and the sixth hole has disappeared.