that's because the simpsons was made 4:3 if you want to stretch it set your tv to auto not original. Most tv companies compromise the transmission ie cut the top and bottom off to give a 16:9 picture but with cartoons it's not possible so they transmit as they were made
It was an example Doh!!! I don't really like it that muchI don't allow the Simpsons to be on my TV.