Audio problem: As the short starts, a hand is drawing several animals with musical instruments to be in the orchestra. And during this there is a music score with the animation. The second one is a pig with a tuba. As the left hand reaches in to pull the picture of the pig away, there is a glitch in the music, it cutting out for a moment with a rough scratchy pop sound, then coming back in as the right hand begins drawing a bird with a violin. (00:00:45)
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.
Continuity mistake: When we see the animals change seats at the start of the cartoon, you can see there is an aisle in the middle of the theatre, but when the show begins in the next shot, the aisle has disappeared.
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: When Goofy searches through the dresser drawers one of the ghosts causes trouble, then Goofy breaks through the top of the dresser and winds up trapped inside, but when all four ghosts appear the dresser top is perfectly fine and that damage has vanished. Also, two of the drawers (one large and one small) fall out of the dresser, but as the four ghosts are pushing the dresser those two drawers have reappeared in their proper places.