Other mistake: During the first dozen or so episodes, during the opening credits, Onizuka is shown spray-painting a picture of a woman on a wall, with the words "Love" and "Piece" written next to her. Obviously, "piece" is a mistranslation, and the wrong spelling. The correct text should read "Love" and "PEACE."
Stranger at the Gates (Part 1 of 2) - S2-E3
Other mistake: In a previous episode ("A Breath of French Air") Ma explains to a french fisherman that she's used to cooking fish as the Larkins have both a pond and a river near their home. In this episode Montgomery complains that there is nowhere around for him to fish.
Mind Your Own Business - S1-E35
Other mistake: Ralph gives Ed the advice to try to "squeeze" his boss for a promotion, but gets fired instead. When Ed comes home, he first stops in to see Ralph but he's not home, just Alice. All he tells Alice is that he had words with his boss and got fired. No details. Ed leaves and Ralph comes home. Alice tells him Ed was fired and described in detail the whole story of him threatening his boss for the promotion. Ed never told her exactly why he was fired.
Bag Ladies - S2-E5
Other mistake: In the first scene with Russell and Claire, Claire is portrayed as being too young to understand his references to Ross and Rachel from "Friends", Ward and June Cleaver, or the song "9 to 5." Later, he tells Adam that he met her while she was playing Grateful Dead songs in the park. That alone would demonstrate that she can be aware of shows and music from previous decades. On a side note, "Friends" ended only three years before this show began.
Space Flag - S1-E5
Other mistake: The kill counter on the screen displays the wrong counts... should display "Space Force 14", "Air Force 15". (00:26:08)
Episode #1.1 - S1-E1
Other mistake: When Tony walks by the school there's a girl in a blue dress with a hula hoop that can't stop staring at the camera.
Other mistake: When Andy pulls his piece of meat out of the fondue pot it hasn't been cooked at all. The fondue obviously hasn't been turned on (in the next shot he sticks some meat in his mouth, which has been cooked and is smaller).
Beavis and Butt-head vs. the Vending Machine - S4-E28
Other mistake: When Butt-head is purchasing the pork rinds from the vending machine, he notes that the selection for them is F2. When he is pressing the buttons to dispense them, he presses the F button twice, but never the 2 button. Somehow, the machine still dispenses the correct item.
Other mistake: When Sam calls Mike a dirty dog, pay attention to the drinks machine behind him. All the brand names are crossed out. Brands include Coca-Cola and Sprite. (00:02:10)
Other mistake: When Fay is talking to Lowell over the walkie talkie, when she is giving him the recipe she is not pressing the button to talk, but Lowell still responds.
The Retainer - S1-E2
Other mistake: The gas chamber is destroyed when the dogs pull a chain that's attached to its front support but it somehow collapses from behind. (00:19:07)
Art Class & Lost and Found - S3-E5
Other mistake: Ned paints a rather obscene painting and brings it up to his teacher. He had just painted the painting and his teacher gets angry at the school cutting the art budget, so Ned holds the painting against his chest. When he takes it off his chest, there is no paint on his chest and the painting had no chance to dry before he put it on his chest.
Other mistake: This comes up in other sci-fi scenarios too - the shuttle is heading down to the planet's surface through heavy cloud cover/disturbances. Everyone acknowledges it'll be a bumpy ride, and the flight down is very fast and tense, trying to keep track of escorts, etc. But there's no need for it to be a fast entry. Their ships aren't aeroplanes which have a minimum speed and have to keep moving forwards. They could just hover and lower slowly through the clouds at a safe speed.
Alterations - S1-E7
Other mistake: When Max drives Charmaine to the surgical clinic, watch the background. In the first few shots, they are driving through some sort-of suburban neighborhood if you look out the windows, but suddenly when the camera cuts outside of the car, they're in a parking lot for the clinic, nowhere near the neighborhood they were literally just driving through. There was no time-jump as they are having a continuous conversation through the entire scene.
Warriors and Guardians - S2-E4
Other mistake: The driver in the blue Mustang (Osito) drives past Nolan and Harper, then makes a u-turn and drives past them again, to Nolan and Harper's left (same direction he came from), but when Nolan and Harper go to chase him, they turn right instead of left. (00:31:15)
Misadventures in Babysitting - S1-E8
Other mistake: When Mr. McGuire is trying to get back into the house to check on how Lizzie is doing babysitting, the lock chain is on the door, so he grabs a saw to cut through it. He begins to saw it - however he forgot to take the yellow cover off of the metal blade. (00:18:40)
Other mistake: In this episode, the news team is asked to go to the office of the head of the station. Before the scene, the camera pans up the building to one of the top floors. In the scene, you can see shorter buildings outside the office including a dome on top of a building that could be a church or a government building, which would never be that tall. The biggest mistake is that you can see trees right outside the building. There are no trees that would ever be that tall either.
Gakkou wa senjouda! Taiketsu Ryouma vs Ryouga - S1-E8
Other mistake: In the establishing shot of the Study Hall one of the girls turning their back to the camera is Akane, recognizable by the yellow ribbon and by the two friends who chat with her. The hair is colored wrong though, pitch black instead of blue-ish. (00:05:00)
Gopherville - S1-E1
Other mistake: In "Sock Safari", when Toopy finds a red thread, his left hand with his glove disappears instantly.
Other mistake: When Kath is taking Kim down to train for netball, she gives her a drink bottle and tells her to keep her fluids up. Kim takes a sip, but look at the bottle, there's nothing in it.