Oldies but Young 'Uns - S5-E17
Other mistake: Just before Charlie and his son leave Peg says "Charlie, my watch". Implying that he took it off her wrist. Yet during the whole scene she didn't have a watch on her wrist. It appears in his hand out of nowhere.
Weenie Tot Lovers & Other Strangers - S5-E18
Revealing mistake: When Peg opens the last weenie tot box, notice that only a ticket falls out. Meaning all the boxes had no tots in them just tickets.
Weenie Tot Lovers & Other Strangers - S5-E18
Continuity mistake: When Al asks for the checkbook to write a check for Bud, Bud puts his right hand on Al's left shoulder. Next shot, Bud's hand is coming off Al's right shoulder.
Kids! Wadaya Gonna Do? - S5-E19
Continuity mistake: Bud comes in the house after telling the old lady to get lost. The door doesn't shut completely. Kelly says open the door open the door. Bud goes to the door and it's shut even though it was open a crack from him not shutting it before.
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.
You Better Shop Around (2) - S5-E22
Plot hole: The supermarket director orders the photographer to take a photo of Al's special shopping cart. Then he turns around a little towards the cart. When the camera flashes, his right shoulder has to be in the whole left side of that picture. (00:07:50)
You Better Shop Around (2) - S5-E22
Revealing mistake: When Jefferson starts to shove the 'regulation Foodies cart,' it's very obvious that the actor makes the shaking movements of the cart by himself. (00:08:05)
You Better Shop Around (2) - S5-E22
Revealing mistake: When Al 'bowls' Jefferson out of the way you can see the stuntman jump high and fall back into some kind of holding wire. It's an annoyingly bad stunt. (00:19:45)
You Better Shop Around (2) - S5-E22
Revealing mistake: Marcy is stacking cartons of eggs in her arms. She turns around and a carton falls on the floor making a busted egg sound although the cartons are obviously empty.
You Better Shop Around (2) - S5-E22
Continuity mistake: The manager gives Jefferson a "wobbly" cart to use, but for the rest of the episode it's a normal, fast moving cart.
You Better Shop Around (2) - S5-E22
Continuity mistake: When Jefferson and Marcy are getting ready to take off during the supermarket race, Al sprays the floor with oil causing them to slip. Being that it is fresh oil, their clothes should have oil stains. But in the next scene, Jefferson and Marcy are perfectly clean.
You Better Shop Around (2) - S5-E22
Revealing mistake: When Marcy is stacking the cartons of eggs in her arms, you can plainly see that they are empty cartons.
You Better Shop Around (2) - S5-E22
Revealing mistake: Watch Jefferson and Marcy's feet at the end. They start to trip before the turkey even hits their feet.
Plot hole: After Al steps out of the coyote doody he goes to Bud and puts an arm around him. Then they walk together towards the same spot - without looking down. (00:03:35)
She's Having My Baby (1) - S6-E1
Continuity mistake: In the prior episode, when Peggy tells Al she is pregnant, Jefferson just smiles at Al after she tells him. In this episode, at the beginning, when Peggy tells Al she is pregnant during the recap, Jefferson smiles at Al but also pats Al on the shoulder.
Continuity mistake: After Bud's Hail Baby, the spoon that had been to the right of Peggy's glass, changes position.
Cheese, Cues and Blood - S6-E4
Continuity mistake: When Kelly shakes her head no to the guy she is playing for $10,000, he misses the shot and the ball stops at the far end of the table. When Kelly goes to take the next shot for the win, she is hitting the cue ball from the other side.
Continuity mistake: When Al Bundy drops the stiletto shoe into the fish tank, he reaches down into the tank to get it and his sleeve and hand are dry as he shows the shoe. Also, hardly any water drips off the shoe. (00:17:00)
So This is How Sinatra Felt - S6-E12
Plot hole: Bud and Kelly hide behind the cash register all day. They talk normally the whole time yet Al doesn't hear a word they say and has no idea they are even there.
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)
Answer: It was one of the hoses connected to the engine, nothing specific, but to indicate that Al tampered with the vehicle.