Corrected entry: When Newman is helping Kramer talk to Pam in The Library, you can see (through the bookshelf) that Newman is mouthing the same words at the exact same time as Kramer. You would expect Newman to mouth some words, pause and Kramer would then repeat them to Pam.
The Fatigues - S8-E6
Corrected entry: At the Jewish singles meeting there is a crucifix hanging on the wall. (00:20:40)
Correction: The Jewish singles party was ironically being held at The Knights of Columbus which is a Catholic fraternity.
Corrected entry: Kramer steps back out of the view of the camera as he opens his shirt, all in an attempt to show Jerry the mistake he's making by shaving his chest. Kramer laughably shouts "look at it!" repeatedly to Jerry, who recoils in disgust at the (supposed) sight of Kramer's thickly-haired chest. The problem is that Kramer's bare chest is shown in episodes before and after and there is nothing unusual about it. In fact, just two episodes later (in Season 9's "The Butter Shave"), there are multiple shots of Kramer's chest. Were we supposed to forget about this little occurrence in Jerry's apartment?
Corrected entry: Near the end of Elaine's conversation with Lippmann about The Muffin Tops in The Bookstore, there is a deep male voice that can be heard saying something unintelligible (it might be Kramer's voice), which must have been layered in the background by accident. (00:04:25)
Correction: I just pulled up this episode on Hulu, and while you can hear a voice going on, I don't see how its inclusion is accidental. They are at a book signing with numerous people, so there is bound to be people talking in the background. Kramer has also invaded the signing, so it could very well be him chatting with people at the event or arguing with Peterman.
The Package - S8-E5
Corrected entry: In this episode, George finds out that Sheila, the photo store woman, is checking out his pictures during development. Right after he discovers this, he goes to Jerry's apartment and starts snapping pictures, one of which is of Jerry fiddling with his stereo with a screwdriver. Later on in the episode, Newman passes by the photo place and happens to see that photo being developed, so he confiscates the roll (which also includes George's sexy photos). The problem is, the photo of Jerry could not have been on that roll since George had already been back to the photo place at least once before after snapping the picture of Jerry. Jerry's picture would've been in the roll that had the picture of the scantily-clad model and of George posing with the Mercedes.
Correction: This is an assumption and there's no proof of this. After George noticed Shelia had been looking at his pictures, he took more pictures (next to the Mercedes and wax Burt) and dropped that roll off. He then started on his 3rd roll of film while waiting for his 2nd roll to be developed. Jerry with his stereo (and Jerry with Elaine) was on this 3rd roll. In addition, when we see Kramer about to start taking pictures of George, we never see Kramer or George load a new roll into the camera, and the sexy pics are on the same 3rd roll as Jerry with the stereo.
The Package - S8-E5
Corrected entry: Jerry's stereo is still visible in the background after Kramer already mailed it.
The Checks - S8-E7
Corrected entry: At the very end of the episode, George tries to save Mr. Wilhelm from the Sunshine Carpet Cleaners cult. As soon as their dialogue ends, the male Japanese TV executive says to the female executive, "With these two idiots, I don't know how the Yankees won the World Series." How in the world does this guy know that George and Wilhelm are/were employed by the Yankees? It's possible George may have mentioned it upon meeting with the executives (off screen). But it's more than reasonable to assume that such a discussion never took place between the executives and Wilhelm, especially considering Wilhelm did not even seem to know about his past experiences due to being brainwashed.
Correction: George mentions earlier in the episode that his work with the Yankees includes working with Japanese television stations who broadcast Major League Baseball. It's likely the Japanese man has met both George and Wilhelm through previous dealings.
Corrected entry: When George tells Jerry that he wants to 'read a book, from beginning to end', Jerry remarks, "I've always wanted to do that." However, in 'Male Unbonding' from Season 1 Jerry told Joel that he had read the Lenny Bruce biography.
Corrected entry: Izzy Mandelbaum throws his back out in Florida, so why is he taken to a hospital in Manhattan?
Corrected entry: At the end of the episode, when Jerry one-ups Newman with the fact that the Newmannium party is being held incorrectly on New Year's 1999-2000 instead of correctly on New Year's 2000-2001, Jerry says, " Oh, that's interesting, because as everyone knows, since there was no year zero, The Millennium doesn't begin until the year two-thousand and one. Which would make your party, one year late, and thus, quite lame." The party is in fact one year early rather than one year late.
Correction: Newman booked the party to bring in the 2001 new year not the 2000 new year. He booked the restaurant for the millenium not thinking that 2001 was officially marked as the new millenium. However most people celebrated the new millenium as 2000. Even if Jerry's comments are wrong its simply a character mistake. Many had the same belief that 2001 was the actual millenium.
Corrected entry: George traveled to Tennessee to deliver The Comeback to Reilly. However,when he is driving away smarting from his second humiliation and a second comeback leaps to mind, while he is turning the car around, you can see by the road signs that he is not in Tennessee but actually in the New York area.
Correction: That's the point: George has flown back to New York, but has thought of yet another comeback. The joke is that he might be flying back AGAIN. Also, it's not Tennessee, it's Akron, Ohio.
Corrected entry: Throughout the entire series, whenever Jerry calls out the window to Kramer, he calls UPWARD. Odd, since Kramer lives next door. This is especially obvious in this episode, when Jerry even says, "Kramer, I'm coming up. We got a cockfight to win."
Corrected entry: In the scene after "Man Hands" crushes Jerry's hand, Jerry is wearing a bandage around his hand. But in the next scene on the street, the bandage is gone.
Correction: The key phrase is "in the next scene". Plenty of time has passed since we saw Jerry, in his apartment, with the bandage on. He had ample time and opportunity to take it off such that it's not a continuity mistake. George had come from wherever he was to meet them. The scene starts with them on the street, and Jerry is wearing a jacket that he wasn't wearing in his apartment.
Corrected entry: At the wedding at the end, Elaine is surprised to see Jerry with Beth. He tells her "Beth and Arnie broke up." We are told the wedding is a week later. Are we supposed to believe Jerry didn't talk to Elaine for an entire week to tell her the news?
Corrected entry: Elaine tells Mr. Lipman about her muffin tops idea, then the next day he has opened a store to sell them. How in the world did he set up a store in just a day?
Correction: He bought out or became a partner in a pre-existing muffin store.
Correction: Newman is prompting Kramer. It makes sense that he would mouth along with the lines, as he wants to make sure Kramer is getting it right.