Continuity mistake: Sam says she's never going to f*ck Carrie and puts her arm around her. A shot later the arm is gone. (00:02:10)
Continuity mistake: When Carrie and Miranda are getting on the bus to Atlantic City, an older lady dressed in pink is sitting down right behind them. As the scene continues, we can see many more people filing onto the bus as the girls talk. But in the next shot of the entire bus, suddenly there is no one at all behind Carrie and Miranda. Not even the lady in pink; the entire bus behind them is empty, although people are still getting on. (00:09:25 - 00:10:35)
Continuity mistake: When Samantha first puts on the gold necklace in the hotel room, the pendants dangling on the right side are lying over the right lapel of her blouse. But after Samantha walks the housekeeper out the door and turns to face Richard, suddenly the same pendants on the necklace are underneath the lapel, though she did not have a chance to fix the necklace in this time. (00:16:50)
Continuity mistake: When Sam leaves her pearly thong on top of the papers, the pearls lie on the papers in the first shot, but over the fabric in the close-up.
Continuity mistake: When Carrie picks up Miranda she is standing still in both the front and back shots. Then Miranda starts to move and says "I'm kidding!" but the angle shot from behind still shows her stiff as a stick.
Continuity mistake: During breakfast, in the back shots of blonde Sam a brunette stand-in takes her place.
Answer: Yes, it is.