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: After the chase, when Michael, George Sr. and Gob all fall to the ground, George Sr. rolls as he lands and ends up a couple of feet away from the others. The shot cuts and he is now right next to them.
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: At the restaurant, as Lucille is saying "I've been a horrible mother", her hand goes from the base of her wine glass to holding the top of it, instantly between shots.
Continuity mistake: In the opening scene when Lucille is unloading groceries, the paper bag on the table keeps changing from being crumpled to smooth.
Continuity mistake: When Lindsay first visits George Senior in prison, she is wearing a hat. From some angles only one ringlet of hair is sticking out of the hat, but from other angles there are several pieces sticking out.
Continuity mistake: In the very first scene with Lucille and Michael talking in the kitchen, Lucille is at the cupboard packing away groceries. The shot cuts and she is instantly back at the kitchen counter.
Continuity mistake: When Michael is lying on the couch at his mother's apartment, the blanket covering him hangs over the side of the couch in some shots, but from other angles does not.
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 Michael are talking about Buster, the long black necklace Lucille is wearing keeps moving on its own. Sometimes it is hanging loose, and in other shots it is half tucked behind her blouse.
Continuity mistake: Throughout Gob and Michael's conversation in the kitchen, the sandwich on the counter keeps changing position without being touched.
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 George Michael goes to Lucille Bluth to ask her if he is related to Maeby, he first knocks on Lucille Austero's door, but in the next shot he is being let into the Bluth apartment by Lucille Bluth. (00:11:10)
Continuity mistake: In the scene where Michael has just taken Lucille number two to Tobias' new club, the shots are obviously taken on different occasions. The collar of his jacket goes from misaligned to correct, his hair goes from ruffed to "done" and the lighting goes from hard and sharp to soft. (00:18:50)
Continuity mistake: When Michael runs into Barry in Reno, the envelope Barry is holding (containing money and a passport for George, Sr.) changes from a manila color to plain white. (00:14:15)
Continuity mistake: Several episodes in season 4 have scenes that take place immediately after the events of the final episode of season 3. However, the 7 years that passed in real life between seasons 3 and 4 are made apparent by the appearance of some characters. Notably Michael Cera and Alia Shawkat who had visibly matured out of their teenage years, and Portia de Rossi, who had plastic surgery on her face.
Continuity mistake: In the security room, in shots from the back of Ron Howard the apron strap is on his neck, above his shirt collar. In shots from the front, and when he turns, the strap is lying directly on his collar.
Chosen answer: "The One Where They Build a House," S2E2.