Homer's Triple Bypass - S4-E11
Corrected entry: This is the first and only episode Marge has said "D'oh".
Girls Just Want to Have Sums - S17-E19
Corrected entry: When Lisa crosses over to the boys side of the school, she looks in the window of the math class where the teacher asks the class the volume of a three circled snowman with a carrot nose. Lisa corrects Martin's answer by saying, "He forgot the volume of the carrot nose. One-third base times height!" This is incorrect, the volume of a cone (the shape of a carrot) is one-third pi radius squared times height. Or if she was going for the area instead, that is one-half the base time height. Lisa always prides herself on being incredibly smart, so she should not have made this mistake, especially when she was so confident.
Correction: Hence why she's still in school. because she *doesn't* know everything. Not a mistake, just a child's cocky confidence.
JC FernandezCorrected 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.
SexyIrishLeprechaunCorrection: While Northern Ireland is part of the UK, the laws differ slightly between Northern Ireland, Scotland, England and Wales, so therefore what he said is true.
Lisa vs. Malibu Stacy - S5-E14
Corrected entry: When Lisa is having her little town meeting awaiting the spoken words from Malibu Stacy she has all of her other dolls in front of her sitting in little chairs facing a little podium. However when Lisa is venting having heard the moronic slogans Malibu Stacy speaks when her string is pulled there is a close up on Lisa and then the next shot is a wider one of the room and it shows Lisa still holding Malibu Stacy but all of her dolls and furniture are gone. During the entire scene Lisa has her entire focus on the Malibu Stacy problem and is not seen moving about the room at all.
Tobin OReillyCorrection: If you watch carefully, you'll see that Lisa is on one side of a divider and the dolls are on the other side. When the scene pulls out to the wider shot, we see Lisa holding Malibu Stacy (just before the wide shot, we see her pull the doll over the divider). Her other dolls are gone, but they're supposed to be. They are on the other side of the divider (the side closer to the window, as established in the first shot of the doll convention, when we see the living room BEHIND Lisa).
Lisa vs. Malibu Stacy - S5-E14
Corrected entry: On the way back from the mall Grandpa is sat in the back of the car, and says that he can't unbuckle his seatbelt. How then does he manage to reach over and honk the horn?
Correction: He's sitting in the middle, and the buckle being stuck doesn't keep the belt from stretching if you lean forward.
Tree House of Horror X - S11-E4
Corrected entry: Homer starts to sing 'I forgot to put the headlights in' but in the flashback (where Ned gets attacked by a werewolf) the headlights are on.
Lisa on Ice - S6-E8
Corrected entry: When Lisa runs into Bart's room and throws a snowball at him, it is quite a powerful throw and on target as it hits him in the face. Yet when the kids are receiving academic alerts in the gymnasium, Lisa can barely throw the piece of paper she has been given. Surely she wouldn't have been able to throw the snowball so well if she lacked such skills?
Correction: Not exactly. Once, I threw a tennis ball hard enough to give a kid a good black eye pretty dang fast. However, when my brother was trying to teach me baseball about a day later, with a similar tennis ball, I couldn't throw it nearly as fast.
Pygmoelian - S11-E16
Corrected entry: When Homer puts the family through an early morning fire drill and rushes them out to the car and drives away they are all in their respective sleeping clothes. However, when they pull up at the Duff Festival they are in their regular clothes, and knowing Homer he wouldn't think far enough ahead to bring a change of clothes for everyone.
Tobin OReillyCorrection: There is nothing to say Homer didn't put clothes in the car. He planned to make the trip to Duff day as quickly as possible. Homer even planned ahead to take the door latches off to ensure no one would escape, meaning this was no spur of the moment decision. There was also enough time between the time they left and arrived at Duff day to have put some clothes on in between.
Lummie
Alone Again Natura-Diddly - S11-E14
Corrected entry: Homer drives his car through the pit stop, and later tells Ned how he parked in the ambulance bay- But they hiked there, rather than driving.
Correction: Homer only references where the car was parked when the ambulance tried to park. As you mention, Homer goes through the pit stop and he would obviously need to park somewhere before returning to the stands. The hiking is irrelevant as he somehow got his car to the track and into the pitstop during the race.
Lummie Corrected entry: Why didn't Lisa notice the scoreboard in Skinners office?
PiemanmooRaging Abe Simpson and His Grumbling Grandson in 'The Curse of the Flying Hellfish' - S7-E22
Corrected entry: When Bart and Grampa are on the shore looking at the paintings that they have just rescued from the bottom of the sea, the authorities suddenly show up. How did they know that they would be there, and that they would have the paintings?
Correction: The authorities mention they had been tracking the paintings for quite some time. Being the location of the paintings had been hidden even from those who stole it (Grandpa Simpson & Mr Burns had to get the keys to find it), the authorities would have likely tracked them until they did recover the paintings. If the pair had been tipped off they likely would have not tried to recover the paintings and the authorities might never find them.
Lummie So It Has Come to This: The Simpsons Clip Show - S4-E18
Corrected entry: When Mr Burns comes to the hospital, he says that Homer is costing his health insurance plan money. But in "Homer's Triple Bypass" Homer says that he gave up his health insurance with the boys at work.
OL1V3R666Tree House of Horror VIII - S9-E4
Corrected entry: When the French launch their neutron bomb at Springfield, on it is written "Le bombe à neutron". The proper spelling is "La bombe à neutrons"
Dr WilsonCorrection: Actually not a mistake. Thats the joke, USA's ignorance of the world around them.
The Twisted World of Marge Simpson - S8-E11
Corrected entry: When Marge and Homer are going back into the house while the gangster war is going on outside, you see the door where there is one of those small "eyes" so you can look out of the door. But when the small guy from Yakuza is walking out of the door, there suddenly is a little window in the door.
don_corleoneCorrection: The door is different; The Front and side doors are used.
Corrected entry: When Bart is crossing off the days in his calendar to show how long he has to go without seeing the no-good Jessica, he eventually circles the first day, a Monday, saying, "OK, day one," and then sits to wait. Immediately after, Marge sticks her head in the door announcing it's time for church - which is usually on Sunday.
Corrected entry: Apu is seen at Homer's BBQ shoveling meat into his mouth, yet, just a few minutes later, he explains to Lisa that he is a "strict vegetarian."
Kamp Krusty - S4-E1
Corrected entry: When Homer is mowing the lawn he runs over the hose, but in the next shot after he talks to Bart the hose is gone.
Amy DobbinsThere'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)
Lummie Correction: This is done purposely because of the lighting difference between the outside and the inside.
Days of Wine and D'Oh'ses - S11-E18
Corrected entry: Homer and his friends said that they couldn't picture Barney without the door handcuffed to him. The birthday party was two weeks ago, and he didn't have it on then.
PiemanmooCorrection: That's not a mistake, it's just another one of many stupid things that the guys say.
Midnight Rx - S16-E6
Corrected entry: The towel Flanders wraps around Apu's head changes shape between when it is first applied, and when the customs agent sees Apu. First it is an almost perfectly round shape with no loose ends, then it becomes a more flat shape with a loose end hanging over Apu's shoulder. When Apu is seen inside the police van, the towel is once again in the original shape.
TwotallCorrection: Since it's a towel, and not an actual turban, it's not a surprise it loses shape and comes apart. And there is time before Apu is thrown into the police van for him, or one of the others, to have rewound it.
Correction: There are at least 2 other episodes where marge says d'oh. She says it when she finds out her mother is dating Mr Burns (Lady Bouvier's Lover) and in another episode when she is impersonating homer (Not sure of the episode).