Corrected entry: When the family is meeting in the Board Room at the office, a boom mic is visible for a few seconds then is pulled out of camera view.
Corrected entry: When everyone is in the conference room talking about who might be a spy there is a boom mic visible at the top of the screen.
Correction: Completely intentional as part of the joke. The conversation in the boardroom includes a discussion about whether or not the room is bugged and if people could be listening, at which point there is silence and a boom mic is seen in shot. It is not a mistake within the show due to the documentary-esque fashion it is filmed in, which occasionally leads to jokes about such elements as camera crews and the self-aware narrating style.
The One Where Michael Leaves (2) - S2-E1
Corrected entry: When Tobias is talking to Michael about joining the Blue Man Group, he walks over to a bowl of fruit and rummages through it. The shot changes and he's rummaging through a bowl of nuts instead. (No time has passed. He's still speaking the same line). (00:16:40)
Correction: There is no continuity error. The bowl of fruit only ever appears on the kitchen island. The bowl of nuts is on the breakfast bar.
Corrected entry: In the first episode of the third season, "The Cabin Show," Steve Holt meets GOB and doesn't recognize him. However, at the end of the season two episode "The Immaculate Election," he is shown a picture of GOB and told that he (GOB) is his father.
Correction: It's well established that Steve Holt isn't very smart.
Corrected entry: When Gob and Michael are in front of the banana stand, we see George Michael in the background putting a prepared banana on the counter. The shot changes and he has suddenly moved and is still finishing preparing the banana.
Correction: He never places the banana on the counter. He does place it in a paper used to serve to a customer so he can hold it by the banana. This is to support the weight while he finishes working on it.
Correction: This is an intentional part of the joke. It is just after they say there "may be a listening device in the room."