Corrected entry: In the episode 'In the Name of the Grandfather', Homer and Grandpa apparently buy the pub in a drunken mistake. The previous owner says, "You sure do know a lot about Irish Real Estate Law". However, the episode is set in Northern Ireland and so any laws are those of the UK. He wouldn't make that mistake.
Corrected entry: In the opening sequence of the show Marge's car pulls in and parks on the left side of the driveway (actually garage but still the left side) while Homer's car is on the right side. However, throughout the series Homer has always parked his car on the left side and Marge has parked hers on the right.
Corrected entry: Creator Matt Groening's initals were initially in Homer Simpson's hair and ear from the side. Matt Groening says himself (in one of the Simpsons comic book specials) that he changed it because it would be too distracting if the secret ever got out. He also says that he puts them in now only when he is drawing pictures for fans.
Corrected entry: Marge's real hair color changes throughout the show. There are some episodes that show her hair is naturally blue, such as ones with flashbacks that show her as a child or younger teen with blue hair. Other episodes indicate that her hair is really brown, but she dyes it.
Corrected entry: In the opening of some of the episodes, just when Bart is skateboarding by Homer, he rides past Moe's. Then, right beside Moe's, is a TV or electronic shop of some sorts. King Toots moves around from episode to episode. At times it is across the street, and other times it is on the same side of Moe's.
Corrected entry: Throughout the whole show, Homer indicates he has three religions. The first one where he becomes an astronaut, he says he is Christian. Then when he becomes a body guard for the mayor, he indicates he is Muslim when his instructor says he can't worship Muhammad and Homer replies, "Not even during Ramadan?" which is a holy day in Islam. And finally in "Bye, Bye Nerdy" he tells Apu he is Hindu.
Corrected entry: The location of Evergreen Terrace and the Simpson home changes dramatically. In 'Homer the Great' the power plant car park runs past the Simpson's backyard while in the rest of the series its in the middle of a housing estate. In 'two bad neighbours' and other episodes there is a row of houses opposite the Simpsons, while in some episodes the Simpson's house is visible without opposite houses.