Revealing mistake: Kelly lost all her hair as a side effect from pimple potion. You can see the lines on her forehead that show she's wearing a flesh piece covering her hair to make her look bald. The color is lighter than her face. (00:18:42)
The Chicago Wine Party - S7-E7
Character mistake: Throughout the entire episode, they talk about the beer tax being 2 cents. At the very end when Terry is doing her on air broadcast, she calls the tax a "2%" tax. There is a big difference.
Tis Time to Smell the Roses - S7-E23
Other mistake: When Al talks about the man who bought the shoe store he wanted to buy, he says the same guy bought the store he used to work at and got his old job back. However, Gary is a woman who owned the store before this episode and again afterwards for the remaining episodes. So it couldn't have been bought by a man because Gary the woman still owns it.
Revealing mistake: When Bud is at the shoe store with Al, right after Bid says something about the woman with chicken wings, you see the flash from a camera.
Other mistake: The guys push Bud out of the line and to the back. When they do that, there is a guy with a black and yellow jersey on with the number 25 in it. There were more guys behind him in the line. A little later, Kelly returns to the line where Bud is. All a sudden that guy with the black and yellow jersey with the number 25 is the person right in front of Bud.
The Bald and the Beautiful - S3-E7
Other mistake: Al and Steve are using Dr fur for growing hair. After using it, Steve says it was recalled. Later in the show, Peg says she is going to the store to buy Dr Fur because it was the only thing that Buck would eat. If it was recalled it wouldn't be available to buy anymore in the store.
Girls Just Want to Have Fun (1) - S2-E5
Continuity mistake: Al is having his fridge repaired. He goes and gets a beer and closes the door. A few shots later the door is wide open without anyone going near it.
Continuity mistake: Marcy's niece asks Bud to take a shower so she can get out of her sticky clothes. Next scene, she's sitting on the couch with a towel on her head. She talks to Bud awhile then gets up and leaves. Shes wearing the same "sticky" clothes and she takes the towel off her head, and her hair is completely dry.
You Better Shop Around (1) - S5-E21
Continuity mistake: When the store employee comes over to ask Al and Peg what they were doing, Peg throws a bag of chips in the shopping cart and says shopping. When Al asks Peg what the ingredients are, next shot the bag of chips are on Peg's lap.
Continuity mistake: The outside view from the Bundy sliding doors/patio is different in the opening and most scenes from the shows. In fact, I can't think of any time it's the same.
Factual error: It seems unlikely Steve's bank or any bank would leave its vault open at night as they close around five or six.
Suggested correction: Steve is the bank manager and is closing up for the day. There is also a security guard sitting right by the door. And he has to unlock the door to let Al in. No mistake here.
The mistake is about leaving the vault door wide open instead of closing it. Not about Steve needing to unlock the front door to let Al in.
My point is Steve is closing the bank with a security guard there and the door is locked. So what if the vault is open? Steve just hasn't closed it yet.
Poppy's By the Tree (2) - S2-E2
Plot hole: Al and Peg are upstairs with the killer. Both of them are screaming, but downstairs, you can't hear anything. Everyone is sitting around talking. It's not until Al and Peg scream again that everyone runs upstairs. And you can tell the screams were "on cue" also.
Factual error: Al uses ashes to cook food on the grill. You can't just throw ashes in a grill and light them! They wouldn't light at all. That's like trying to light cigarette ashes and expecting them to burn hot enough to cook food.
Just Married ... With Children - S2-E20
Revealing mistake: When Al spins Peg on the wheel to win the bowling ball, in the long shots, you can plainly see its not really Peg on the wheel. It's a dummy.
Deliberate mistake: When the family is trying to get money from Al at the start of the episode, he throws it on the ground making the rest of the family to dive on it and you can see Bud get it, then throw the bunch of money in the middle of Kelly, Peg and Bud so they can all get to it instead of taking it all. (00:02:10)
The Mystery of Skull Island - S6-E14
Continuity mistake: When the grown-ups are playing 'Ethical dilemma' Peggy lands on the field 'Sexual intimacy' (the field right after 'Start' with a one-word-title). Four minutes later in the show Al lands on the same field - but now it's 'Caring'. They can't have turned the game board because all the cards on it are in the same position. (00:09:40 - 00:13:40)
Master the Possibilities - S2-E16
Factual error: A credit card company doesn't send random cards to just anyone. One comes for Buck. First of all you need a social security number, proof of income etc. And looking at what Al and Peg bought, it's an unlimited card.
Suggested correction: Decades ago (including the 1980s when this show aired), credit cards were sometimes sent to almost anyone - or "anything", such as a family's dog. People used to joke about actually getting a credit card for their cats, dogs, infant children, etc. Credit card representatives also went on campuses to lure "unemployed" students into getting credit cards by offering a free gift. They hoped college students would buy what they wanted or needed and parents would bail them out (pay the bills).
Suggested correction: It should be pointed out that credit card companies, especially in the past, do send out random cards (and offers). They buy customer information from stores from various sources, like warranty cards. People who have received credit cards for their pets (which has happened) have often filled out warranty cards with their pets' name but the rest of the information is the person's.
And some of the "less than honest" recipients of unsolicited credit cards were able to use the cards practically immediately, so went on shopping sprees and charged thousands of dollars for whatever they wanted with no intention of paying or being identified. And not all college students had parents that would bail them out, resulting in huge losses. It took a while, but the credit card companies learned from their mistakes and made drastic changes to avoid getting ripped-off in the future.
The Legend of Ironhead Haynes - S8-E23
Other mistake: A lady comes in the shoe store and asks for a shoe in a certain size. She tells Al to hurry because she doesn't have much time. Al goes in the back to get her shoes. She sits there for 6 seconds then leaves. Why bother going to get shoes?
Other mistake: Al is running the water down the rabbit hole. Bud says the ground isn't even wet and asks where the water is going. A few seconds later Marcy is walking through the yard squishing on the ground because it's flooded.
Just Married ... With Children - S2-E20
Factual error: In the game show near the end, when Marcy and Steve come out as Al and Peggy. When the real Al and Peggy win the car, because they used Marcy and Steve's names, the car would have never gone to the real Al and Peggy. In reality, it would have gone to Steve and Marcy because it was won under their names. Al and Peggy would not have been able to keep the car. In fact Al and Peggy would not have been allowed to be on the show at all using someone else's name.