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: When the Lion says, "Now, to an all musical program" he raises his arms and his shadow is behind him up on the curtain. But without him moving, it cuts to a far shot, and suddenly his shadow is on the ground beside him with one arm of the shadow up on the curtain. (00:02:20)
Continuity mistake: During the "Petrified Florist" film that is being shown at the theatre, Lester Coward sits at a table in the Desert Inn and in the background there is a sign that reads: "Tom Collins Straight Whisky Gin Fizz." But when Coward stands up and recites his poem, the words "That's all Folks" have been added to the sign.
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.
Continuity mistake: When lawyer Goodwill is in the secret laboratory, he picks up a bottle that has "Jekyll and Hyde Juice" written on the label, but when we see him with the bottle in the next shot, the words have disappeared.