Audio problem: After Sylvester gets a massive electric jolt by holding the cord, we cut back to Polly who now repeats, "Lights on." But the first time he says, "Lights on!", his beak does not move.
Lighthouse Mouse (1955)
1 audio problem - chronological order
Continuity mistake: When the little mouse disappears behind the elevator door, you can see the extension cord is missing, but reappears when Hippety and the mouse behind the door play back and forth switcheroo.