There's No Disgrace Like Home - S1-E4
Corrected entry: Before Homer enters the pawn shop you can see the TV is a purple color. As he enters the store the color of the TV is now blue. (00:14:30)
There's No Disgrace Like Home - S1-E4
Corrected entry: The logo in the pawn shop window looks different on the inside than on the outside.
There's No Disgrace Like Home - S1-E4
Corrected entry: During the parts where you see the crowd applaud Mr Burns' speech there are two people on the bottom-left who swap skin colour.
There's No Disgrace Like Home - S1-E4
Corrected entry: When Homer hits Barney in Moe's he says "here's five you haven't met" meaning his fingers. Only problem is all The Simpsons characters have four fingers.
Correction: They probably did this for a joke.
Also, later on in the series, Lenny and Carl ask why it's called a high five when they only have 4 fingers.
Correction: This is done purposely because of the lighting difference between the outside and the inside.