Continuity mistake: When Carrie and Bill are smoking at the bar, her right arm is lowered or close to her mouth, depending on the shot.
Continuity mistake: On the fery, Carrie hugs Charlotte and a blonde woman passng by disappears between shots.
Continuity mistake: When Miranda hands the show tickets she gives Samantha's twice and Carrie's tickets three times.
Continuity mistake: When the girls are in line for a show, Sam is either holding her purse or keeping it under her armpit. This keeps changing in almost every shot.
Continuity mistake: At the Indian restaurant when Bill kisses Carrie's hand she lowers her right hand in one shot, but has it raised and on her left arm on the other.
Continuity mistake: When Carrie says the politician is hot, Miranda is about to drink her tea. Shot changes and now she is holding the knife and fork.
Continuity mistake: When the girls are having a salad and talking about the politician, Carrie is toying with the knife with her right hand in one shot, or grabbing the fork from another angle.
Attack of the five foot ten woman - S3-E3
Continuity mistake: The episode 'Attack of the 5 foot 10 woman' in season three, when Charlotte is afraid of the sauna. She is running into the sauna with a towel wrapped around her waist. The towel comes loose and is nearly falling off - but in the next shot it is neatly tied around her waist.
Attack of the five foot ten woman - S3-E3
Continuity mistake: When Magda opens Miranda's 'goody drawer' Miranda quickly slams it shut it with her hip. In the next shot, it is still open a little way.
Attack of the five foot ten woman - S3-E3
Continuity mistake: When Natasha's friend is gossiping about her to Sam, a waiter passes behind Carrie but disappears in the next shot.
Attack of the five foot ten woman - S3-E3
Continuity mistake: When Carrie shows the Manolo bag to Charlotte the position of her hands on the bag changes in every shot.
Attack of the five foot ten woman - S3-E3
Continuity mistake: When Magda the cleaning lady comes, she has a towel in her hand. A shot later the towel's hanging by the basket under her arm.
Continuity mistake: When Carrie and Shaun are laying on the floor of her bedroom, she has her left hand resting on her chest. But in the very next shot; her left arm is laying across her stomach, and her left hand is curved around her right waist. No time has passed in between these shots. (00:12:25)
Continuity mistake: During this scene when Samantha is confronting her new assistant, the office set-up is completely different than before, when Nina G. was working for her. The assistant office space is much larger, glass desk, different angle, next to small conference room instead of Samantha's office, etc.; obviously not the same office set as previously used. Yet Samantha has not changed offices at all during this time period, as it wasn't too long ago when she fired Nina G. Something as major as changing offices would definitely have been mentioned in the plot (as changing apartments always is); and there hasn't been enough time since she fired Nina G. (00:13:45)
Suggested correction: You're assuming that moving to a new office must be a plot for a new episode, which makes no sense (plus, it's a show that revolves around sex, women, restaurants and bars). Furthermore, the episode you mention is S2E17. Many months have passed and it's perfectly plausible for Sam to move some place else.
Continuity mistake: After spilling the sauce on the floor, when Miranda is discussing with her boyfriend her bag suddenly disappears from her shoulder. Later on it magically appears on the floor.
Continuity mistake: When Miranda drops the paper bags on the floor a lettuce and a bottle of water fall out. Seconds later the stuff changes completely: The bottle is gone, the bags are in a different position and, best of all, Miranda's leather bag (which was previously hanging on her shoulder and suddenly disappeared between shots -listed mistake-) magically reappears on top of the mess.
Continuity mistake: When the tomato jar crashes on the floor, the splatter changes shapes between shots and the label disappears in the second shot.
Continuity mistake: Baird puts a sock inside Charlotte's crotch and her tie gets skewed. A shot later it's straight.
Continuity mistake: During the exhibit, when Baird shows up, a group of people suddenly appear behind him and Charlotte.
Continuity mistake: While in the exhibit, Stanford is behind Carrie, but a shot later he is standing next to her.