The Big Bang Theory (2007) - 7 major mistakes

Continuity: When Leonard and Penny are talking in the dryer room, the size of the towel Penny is folding keeps changing.

Continuity: When Sheldon is telling Leonard that he didn't ask Penny out, there is a yellow food-bag on the counter between them that keeps changing it's position with every shot change.

Continuity: Sheldon puts the bag in the bin at the start of the episode so that the handle's are facing the ground. When he gets the bag out, the handles are at the top of the bin.

Continuity: At the end when Sheldon has got a burger, the amount of burger left changes depending on the camera angle.

Continuity: When the guys are using the whiteboard to figure out their cinema plans, Sheldon draws two black X's on the board with a marker. In the following shots the appearance of the X's changes.

Continuity: In the laundry room when Penny is talking to Sheldon, Sheldon takes some time arranging a blue shirt on his plastic laundry folder. Then it suddenly turns into a pair of socks, which he folds and then picks up the blue shirt again. There was not enough time for him to switch out the shirt for the socks.

Continuity: At the buffet table when the gang gets food, Howard walks in with his 'date.' Between shots, as he walks in, in one shot Sheldon puts his right hand up on his plate. In the next shot his hand is down.