Continuity mistake: When Charlotte leaves dinner to argue with Trey she leaves her napkin on the table, but it disappears a shot later. A shot later it reappears.
The real me - S4-E2
Continuity mistake: Anthony's golden necklace suddenly disappears before the show.
Continuity mistake: When Richard and Sam are having dinner they raise and hold their hands. From the opposite angle they are lowered. This changes back and forth.
Continuity mistake: When Miranda holds the rattler the way its ribbon falls changes between shots: First it all falls on the left side, then it's split in two halves.
I heart ny - S4-E18
Continuity mistake: During breakfast, when Carrie says "Big is different" a waitress with a silver bracelet carrying a jug walks from left to right. Shot suddenly cuts and the waitress is walking from right to left.
Continuity mistake: When Carrie and Miranda arrive at the wedding dress store two Caucasian women stand on the right, behind them. Then they are suddenly on the left. Half a second later, two Afro-American women have taken their place.
Continuity mistake: The musician leaves a note for Carrie on top of the napkin. A shot later the napkin is inches away and the note is on top of the glass table.
The agony and the 'ex'tasy - S4-E1
Continuity mistake: Charlotte holds her notepad while Trey asks her to take off her panties. Then the notebook swaps hands.
Continuity mistake: During breakfast, when Carrie says she spent the night with Big, the pancake on Miranda's fork appears and disappears randomly.
Continuity mistake: When Miranda and Steve walk down the street there are a group of workers behind them and a truck on the right. Suddenly they all vanish and both are meters ahead.
My motherboard, my self - S4-E8
Continuity mistake: After Carrie is told that her computer is wasted, she is home looking at the phone, which is facing the keys. A shot later it has turned 180ยบ around.
Continuity mistake: When Oliver spots Carrie's engagement ring she drinks Martini and the toothpick holding the olives is next to her mouth, a shot later it has magically moved next to her hand, but a shot later it's nowhere to be seen.
Continuity mistake: When Carrie and Aidan are in bed together, he hands her the second picture and she holds it with two hands. A shot later she is holding it with one. A couple seconds later she finally grabs it with both.
Coulda, woulda, shoulda - S4-E11
Continuity mistake: While having breakfast, Charlotte says "what's not about me" and red berries suddenly appear on Sam's fork.
Continuity mistake: When Aidan is cooking, two set lights are reflected on the cupboard.
Visible crew/equipment: When Charlotte shows Tray the refurbished bedroom, a squared set light is reflected on the wardrobe.
Continuity mistake: When Miranda lies on the rug, the phone is next to the upper part of the rug. When the shot changes, it lies on the middle part, away from the rug.
Continuity mistake: When the waitress brings Charlotte's breakfast, a shot later the waitress is magically gone, Charlotte's hand is on the mug and, last but not least, the blue napkin disappears.
Continuity mistake: In the cabin, when Big puts the cigarette in his mouth, the wine bottle turns around between shots, check the label.
The agony and the 'ex'tasy - S4-E1
Continuity mistake: Big's tie is tucked inside his jacket, but loose in the rest of the shots.
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