Continuity mistake: When the artist stops using the airbrush he holds it with his left hand. A shot later it's in his right hand where he drops it off.
Continuity mistake: When Carrie exits the club there's a woman with a bulky silver wig behind her. When the shot changes the woman has moved several meters back and is walking by again.
Visible crew/equipment: When Big arrives at the cafe a moving boom mic is perfectly visible on the glass behind with an arm and a hand moving it.
Continuity mistake: Before dinner, Miranda holds the candles with her right hand. Then puts them in her left hand. A nanosecond later, from a different angle. She is leaving them on the table using her right hand. She couldn't have used her left hand for she is holding the napkins and they would've fallen down.
Continuity mistake: When the girls sit down to eat Chinese food, Sam puts the oyster pail away, but half a second later her hands are away from it, fiddling with something else.
Continuity mistake: In the kitchen, Sam has Chinese food in her chopsticks and says "she's like a model." She takes the chopsticks to her mouth, then angle changes and she is picking food again, though this time less amount.
Other mistake: When the girls are at a restaurant right after Carrie leaves the Hamptons, Charlotte picks up her glass and puts her mouth on the straw as if she's drinking, but the liquid in the glass doesn't budge.
Continuity mistake: While at their friends' place, Carrie holds her glass of wine wth her index finger extended over the bowl. A shot later the grip has changed completely.
Continuity mistake: When Charlotte arrives to visit Sam, the doorman is facing straight and turns his head to the left. A shot later his whole body has turned to the left.
Continuity mistake: At the party, when Samantha is talking to Sean, she holds her glass at breast level, but when his wife arrives it is at mouth level.
Continuity mistake: When Carrie and the guy kiss at Central Park a man in a gabardine walks by fast but disappears in the following shot. Then he reappears seconds later walking slowly.
Continuity mistake: When Peter's wife asks him if Carrie saw his d*ck, he has a mug in his left hand. A shot later it disappears and his arm is lowered, only to reappear in the following shot.
Continuity mistake: When Carrie bumps into naked Peter, his right arm is lowered or raised scratching his ear, depending on the shot.
Continuity mistake: When Carrie is at her friend's place in the Hamptons her left arm is either on or off the table depending on the shot.
Valley of the twenty-something guys - S1-E4
Continuity mistake: Carrie receives a phone call from Samantha and her voice over says she needs her morning Marlboro Light, however, when she picks up her pack of cigarettes, you can see that it is a pack of Merits.
Valley of the twenty-something guys - S1-E4
Continuity mistake: During the scene when Carrie and Sam are in the changing booth at the clothing store, Carrie starts helping Sam take his shirt off. She pulls the outer plaid shirt down quite a bit, revealing his white undershirt. But in the next shot of him, Sam suddenly has the plaid shirt back up around his neck. Then in his next shot, it's back down and the white undershirt is showing again.
Valley of the twenty-something guys - S1-E4
Continuity mistake: When Carrie tells Big to call her, two men walk behind him. Shot changes to Carrie walking away and they suddenly reappear behind Big. Then shot on Big and when Back to Carrie they reappear behind him for a third time.
Valley of the twenty-something guys - S1-E4
Continuity mistake: When Carrie meets Big next to the wobbly table, a man in a grey suit and green shirt walks by behind Carrie. Then disappears, then walks behind her again.
Valley of the twenty-something guys - S1-E4
Continuity mistake: When Carrie checks Sam's pierced tongue she reaches her hand towards it. In the close-up she touches the tongue and then removes her hand, but in the following wide angle her hand is still touching it.
Valley of the twenty-something guys - S1-E4
Continuity mistake: When Carrie checks Sam's phone number written on her arm, the ink is really noticeable in the close-up, but in the following wide angle it is light coloured and almost invisible.
Answer: I'm a long-time fan of the show, having re-watched it many times, and I definitely remember slightly different dialogue at the end of that episode than what's on my DVD. I'm afraid I have no idea why this change might have been made or any other info, but you're not insane.
Purple_Girl