Don't ask, don't tell - S3-E12
Continuity mistake: When Miranda says she's going to date a doctor, Sam is drinking with her right hand and then putting the glass down, but the shot changes and she's using her left hand instead.
Running with scissors - S3-E11
Continuity mistake: When Sam asks the girls if they have had an AIDS test, Carrie's hand is on top of the magazine, but then it jumps to to the edge of the magazine.
Running with scissors - S3-E11
Visible crew/equipment: During breakfast, when Charlotte asks about upper length gloves, check her lenses reflection: Sam (in front of her) is replaced by a big squared object, most surely the camera.
Continuity mistake: When the dog runs away Carrie tells Big to go home. There's a man behind her with a blue shirt drinking. Half a second later he has turned his back.
Continuity mistake: When Pete the dog runs away, a woman in white trousers on the left suddenly appears between one shot and another.
Continuity mistake: During cocktails, when Charlotte appears Carrie takes a sip, but a shot later her arm is down.
Continuity mistake: When Sam has her smoothie-remedy in front, it has a centimetre of bubbles on top in the wide close-ups, but none in the wide angles.
Continuity mistake: At the restaurant, when the lawyer says goodbye to the girls Miranda's right hand is on the papers or behind the the table, this keeps changing back and forth.
Continuity mistake: When Miranda checks the prenup she turns the page and says "Nada!" then lets the page fall. Half a second later the page is turned again.
Continuity mistake: When Aidan's truck leaves, a woman on the left suddenly appears between shots.
Continuity mistake: Charlotte asks Trey for the guest list and he hands it to her wit his left hand. A shot later he holds it with his right hand.
Continuity mistake: Sam says "we have all!" and Charlotte is next to the counter standing sideways. She turns around and walks towards Sam. Shot changes and she is back by the counter repeating everything. (00:02:40)
Continuity mistake: When Sam asks her friends if anyone has had the bad taste semen problem, Miranda's mug is on the table. Half a second later it is close to her mouth.
Continuity mistake: When Sam talks about sperm taste and Charlotte leaves, Sam grabs the mug's handle, then from another angle her arm is down, then back to a front shot and she is holding the handle again.
Continuity mistake: When Trey's mom asks Charlotte if she plays tennis, she takes out a cigarette. She never lights it (nor do we hear any sound), but half a second later it is already lit up.
Continuity mistake: When Trey's mom orders the cheese nibblings, Trey's arm swaps from lowered to drinking from a glass.
Continuity mistake: After meeting Big, while ordering food with the girls Carrie closes her menu twice. (00:08:14)
Continuity mistake: When Carrie holds the menu she either has her right arm down or holding the menu.
The big time - S3-E8
Continuity mistake: When in the ladies' room, Sam is painting her lips with the brush and says "he's in blue ball hell" then the brush is away and she is using her finger, instead.
The big time - S3-E8
Continuity mistake: While on the boat party, Carrie brings a drink to Charlotte and as cruise suddenly appears out of nowhere behind her.
Answer: Yes, it is.