Audio problem: Right after Helga is standing behind the "ARNOLD" on the pavement, when she says "Hey Arnold", her lips move as if she's saying it slowly (this is fixed in the 4th season).
Audio problem: The computer's voice says "golf shoes" while the screen says "golf cleates".
The Raffle - S3-E3
Audio problem: When Kel breaks the TV, the sound is a very clear overdub to make it clear the TV is broken. (00:08:15)