I heart ny - S4-E18
Revealing mistake: At the end of this episode when Carrie is walking away from Mr. Big's apartment; she notices an Autumn leaf, and follows it with her eyes as it floats down to the ground. However, this leaf is actually digital and not real. Sarah Jessica Parker had to pretend to be staring at a leaf that wasn't there while filming; and if you watch her gaze carefully, it doesn't always follow the path of the leaf. She looks down too soon, before the leaf has a chance to float down that far. (00:29:40)
I heart ny - S4-E18
Continuity mistake: When Carrie walks into Miranda's delivery room, we see a shot of her from the back, and she's stopped walking, but then the very next second we see her walking into the room again.
I heart ny - S4-E18
Continuity mistake: When Carrie watches the leaf falling the curb is fully lit. When she bends down to pick it up there are shadows everywhere.
I heart ny - S4-E18
Continuity mistake: When Steven hands the baby to Carrie his chest is bare and arms are showing. When Carrie holds it he is fully covered and the arms are tucked inside the sheets. Then Carrie hands him to Miranda and the baby's arms are moving freely again.
I heart ny - S4-E18
Continuity mistake: When the nurse tells Miranda to push she has her head raised, but half a second later it's lying against the pillow.
I heart ny - S4-E18
Continuity mistake: While Carrie and Big are on the horse buggy, Big asks the driver to speed-up. When the horse gallops, Big and Carrie disappear.
I heart ny - S4-E18
Continuity mistake: When Miranda grabs the cradle instructions she grips the middle part of the paper. A shot later she is holding the lower part of it.
I heart ny - S4-E18
Continuity mistake: At MoMA, when Charlotte is chatting, two women walk from right to left but disappear in the immediate opposite angle. Several seconds later they reappear.
I heart ny - S4-E18
Continuity mistake: Miranda says "if she was going to wind up with anybody" and lets go her fork. A shot later from another angle she is holding it again. (00:10:50)
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.
I heart ny - S4-E18
Continuity mistake: When Richard arrives late, the watch on the bed turns around between shots. Though Sam's left arm was offscreen, she didn't move it at all and therefore couldn't have moved the watch.
I heart ny - S4-E18
Continuity mistake: When Sam and Carrie walk down the street, a woman in white and a man with a brown shirt pass them by twice.
I heart ny - S4-E18
Continuity mistake: Carrie says "He's not Niagara falls" and Miranda takes the fork to her mouth. A shot later it disappears. (00:09:51)
I heart ny - S4-E18
Continuity mistake: During breakfast, after Charlotte says "you had sex with Steve" Miranda's fork disappears from her hand.
I heart ny - S4-E18
Continuity mistake: When Miranda decides to name the baby Brady her hair swaps from dry and brushed to sweaty and messy.
I heart ny - S4-E18
Continuity mistake: Carrie tells Big he's "the Chrysler building" and extends her arms. A shot later they are lowered.
I heart ny - S4-E18
Continuity mistake: When Sam spies Richard, the passers-by are not continuous between shots.
I heart ny - S4-E18
Visible crew/equipment: Lighting screens are reflected on Sam's sun glasses when she spies Richard.
I heart ny - S4-E18
Revealing mistake: When Sam and Carrie walk, bystanders sneak-in shot to stare at filming.
I heart ny - S4-E18
Continuity mistake: When Sam says she's a love-aholic Miranda is holding her mug then not.
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