Hot child in the city - S3-E15
Continuity mistake: When Jenny's friend with the sapphire braces talks to Miranda, her right arm's position is not continuous between the front and side shots.
Deliberate mistake: The second time they show Samantha having sex on her 'rolling bed', you can see that the guy is too far above her to actually be having sex with her. They are too far apart, probably to make it less awkward for the actors. (00:12:05)
What goes around comes around - S3-E17
Revealing mistake: When the gardener hands Charlotte the rose, he is supposedly picking it out of some rose bushes he is in the process of planting. He even makes a motion as if 'picking' it from the bunch. But when he hands the single long stem rose to Charlotte; it's obvious that this rose has already been cut, and is missing the lower leaves. (00:16:05)
What goes around comes around - S3-E17
Continuity mistake: Trey hits the last tennis ball in the basket but a shot later another ball appears.
Continuity mistake: A couple with a man in green holding a brown notebook walk behind Charlotte but disappear in the following shot. (00:03:50)
Continuity mistake: Books on top of Charlotte's fireplace fall down between shots. (00:10:02)
Revealing mistake: When the transvestite is throwing eggs at Samantha's window, she is holding the cardboard egg container in her left hand. She keeps throwing eggs, but you can tell by the way she is holding the egg container that it is really empty. It flops down vertically from her hand, and there is no way eggs would be able to remain in the egg crate by holding it in that manner.
Continuity mistake: During the party, when the music starts the man with white bermudas and light blue shirt behind Charlotte keeps changing positions between shots.
Continuity mistake: In the duck pond, Big's wet hairstyle changes between shots. Also Carrie's, from soaking wet and straight to slightly curled.
Continuity mistake: After Trey and Charlotte have sex, the way his jacket lies on the box changes between shots.
Continuity mistake: At Charlotte's, Sam reaches for the Martini on the fireplace and turns around. A shot later she is reaching again for the Martini and turning around again.
Continuity mistake: Carrie places a thick blue book on the right side of the fireplace, but a shot later it appears on the far left side.
Continuity mistake: While unpacking at Charlotte's place, she holds one candle in one shot, but they suddenly become two a second later.
Continuity mistake: After Charlotte twirls her drink swaps hands between shots.
Continuity mistake: When breakfasting, Sam pinches a blackberry but it disappears half a second later.
The agony and the 'ex'tasy - S4-E1
Revealing mistake: When Charlotte arrives at Carrie's apartment to pick her up, Carrie is in the shower. As Charlotte walks towards the bathroom, there is a clear shot of Carrie showering. Sarah Jessica Parker appears to be wearing some sort of minimal tan colored undergarments, to protect her modesty while filming. (00:24:20)
The agony and the 'ex'tasy - S4-E1
Continuity mistake: When Carrie is showering after being stood up at her party she is not wearing mascara as she stands with her face under the water, then as she opens the curtain to talk to Charlotte again there is no mascara. She puts her hands briefly over her eyes and when she takes them away, mascara is visible all over her eyes and cheeks.
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