The Rass'lin' Clampetts - S6-E22
Other mistake: When Granny throws the Boston Strong Girl out of the ring at the end, you can tell that the Boston Strong Girl is jumping to get over the ropes.
Other mistake: The banner over the platform says "Miss Vestal Virgin 79 B.C.", when it was earlier announced several times as the 72 B.C. Vestal Virgin festival.
The Great Egg Heist/The Feud - S2-E9
Other mistake: In the Great Egg Heist, when they arrive at the museum, Jimmy gives everyone shishkabob-shaped earplugs for Libby's scream. But in the next shot, if you look at everyone's ears, there are no earplugs. Also, in the next shot, next to Libby you can see Carl putting his hands over his ears. This is impossible because the pointy ends of the earplugs would stab Carl's hands.
Other mistake: When Jen gets into the elevator, it says '34th floor.' However, when Jen looks at the panel with the numbered buttons, the numbers only go up to 31.
Other mistake: In the first scene when Bo and Luke are practicing with the General Lee, you see Bo using the clutch, but in the next shot both hands are on the wheel. He didn't have any time to move his hands in about a milisecond.
Other mistake: After Kirsten is talking to Sandy about the fact Seth got into a fight and she comes inside to see that Ryan has made breakfast, there is no way he could of set the table, found all the utensils and ingredients and cooked them by the time Kirsten gets back inside.
Other mistake: Eddie and Chelsea begin sharing notes in class. After Raven has picked it out of the trash, she reads what Eddie and Chelsea have put. Chelsea says, "Can't wait", but how could she? Eddie threw the note and it didn't reach her, just the floor, so Chelsea never read it nor make a reply.
Tea and a Total Lack of Sympathy - S2-E10
Other mistake: Karen asks Mrs. Freeman to put a stamp on her letter and pop it in the post, yet there is no writing on the envelope whatsoever. (00:28:20)
The New Kid - S1-E2
Other mistake: At the start when the gang change the time on the clock in the classroom, it wouldn't control the main school clock, plus in every other episode the clock has been operated by The Box on the side of the school, as shown in " The spy who came into the playground".
Other mistake: The Time Expansion Helmet was supposed to allow Dexter to perform his 30 minute morning task in 30 seconds. Since this is the case shouldn't the cat have hit the fishbowl ages ago as time is not frozen.
The Elements of Harmony (2) - S1-E2
Other mistake: At the end of the episode when Princess Celestia is talking to Twilight Sparkle you can see that Princess Celestia's tail is on top of her leg instead of in-between. It's covering her cutie mark.
Other mistake: When it is Dewey's birthday Malcom grabs a piece of the cake. It goes to Dewey then back to Malcom and he is chewing, but there is no bite in the cake.
Other mistake: In the closed-captioning, when Arnold and Gerald "touch thumbs" (and you hear that "sproing" sound), the caption says "[glass shatters]"
The Lion Sleeps Tonight - S8-E18
Other mistake: At the beginning of the episode, when Meredith, Derek and Zola see the lion crossing the street in front of the car, the lion roars and it is clear that the lion is not missing any teeth. However, later in the episode, Richard removes a tooth that had gotten lodged in the male mauling victim's arm. The victim was the lion's owner and the attack happened in his house, so by the time the lion was out the tooth should already be missing.
Winter Luau - S1-E9
Other mistake: When Lucas is about to take Alexa from her friends, you can hear them re-using an audio clip from a previous episode, "But if I tell them the same thing is gonna happen to me" which would only apply if this was before Alexa tells everyone that she is the one with cancer.
The Thrice Cream Man/The Flibber-Flabber Diet - S1-E7
Other mistake: In "The Flibber-Flabber Diet," Chowder and Truffles return when Mung calls them. How could they hear him when they'd already left?
Surf's Up! Joker's Under! - S3-E10
Other mistake: An amazingly precognizant Dick Grayson is already wearing his surfing togs before Commissioner Gordon calls to say that Joker has invaded the surfing community. (00:04:30)
Suggested correction: Dick isn't amazingly precognizant. He's wearing swim trunks while using the rag to prep his own surfboard. Barbara Gordon was already at the beach with Skip, and Dick is heading to the beach with his surfboard as well (00:04:34).
The Debt (2) - S3-E7
Other mistake: At the end when it shows that Xena did kill the "green dragon", you can see his eyes move when the camera pans around his face to show the hair clip in his temple.
Other mistake: Twelve seconds into the intro, the shot of the store with the name Adrian Grenier above it is mirrored. Notice the reversed lettering in the signs. (00:00:10)
Suggested correction: Does something in the intro count as a mistake? Even still, the signs could be facing the inside of the store on purpose, making it look like a reverse image from the outside. Just to the right of the store with Adrian Grenier's name on it, we see a sign for Pizza displayed correctly.
I would say, for this type of intro, it should be considered a mistake. I'd call it an "other mistake" as it wasn't done deliberately. There's no way the reversed imaged signs point into the store. The photo store has a solid sign that's not inward facing, with the word "Kodak" flipped. The neon signs facing outwards are also flipped. And the pizza signs are also incorrect. The p and z's are flipped as well.
You're absolutely correct, I do see the reverse print on the photo store. Oddly enough, one of the pizza signs is displayed correctly, however.
Other mistake: Whenever Charlie is playing the piano, it is clear he really is not. We hear notes playing that his hand is nowhere near at the time.