Continuity mistake: When Michael is sorting through the pile of mail, just before the doorbell rings, we see him place the same green envelope on the table twice.
Continuity mistake: When Tobias is directing the play, he slams his folder down on the floor just in front of his chair. A few seconds later the folder has moved and is now facing in a different direction and is several feet away from the chair.
Continuity mistake: Just after Gob snatches Michael's sandwich away, Michael is left with just a few torn pieces of napkin. Seconds later he has what appears to be a whole napkin in his hand again.
Top Banana - S1-E2
Continuity mistake: When Gob is taking the dead dove out of the refrigerator, the bag is folded up toward the camera, when they cut back to him and the dove the bag is folded facing away from the camera. (00:13:10)
Continuity mistake: When Lindsay and Michael are talking about Maebe's grades, the test paper that Lindsay just put on the fridge door sits near a note about running out of milk. In the next shot, the items have moved and the test paper is now mostly covering the note.
Continuity mistake: When Michael, Gob and Lindsay are in the kitchen talking about throwing a surprise party for their mother, Michael puts down a can of Sprite on the counter in front of his bag. In the next shot, the can is next to the bag and the coat that was over the bag has also moved, without there being time for anyone to move these items.
Continuity mistake: When Lucille and Maebe are talking at the prison, Maebe's scarf is sometimes tucked inside her collar, and sometimes hangs down loose on top of it.
Continuity mistake: When the two Lucilles are talking at the bar, the position of Lucille Bluth's drink on the bar changes between shots.
Continuity mistake: When Michael and Marta are talking in the doorway at the hospital, the position of Marta's handbag straps changes between shots. Sometimes both straps sit over her shoulder, whilst in other shots one strap is slipping down her arm.
Continuity mistake: When Tobias meets with the school principal, the number of bites taken from the principal's sandwich changes between shots.
Continuity mistake: When George Michael is visiting George Senior in prison, the level of drink in the cup on the table increases between shots.
Continuity mistake: At the rehearsal for the play, when Steve Holt is called up to the stage to play Beatrice, his jacket disappears between shots without him having time to take it off.
Chosen answer: "The One Where They Build a House," S2E2.