Audio problem: When Carrie is meeting with Sarah Michelle Gellar and she is told to guess which star is interested in being involved with her project, SMG mouths 'Warren Beatty' and not Matthew MConaughey as is heard.
Audio problem: When Charlotte is talking to a man at the Playboy Mansion, the camera is on her and in the middle of her line cuts to him, while you still see her in the left corner. Though her line continues, she's not moving her lips.
Audio problem: Carrie tips her cigarettes into the toilet and flushes it. The shot is looking into the bowl when we hear the flush, but the water doesn't move.
Audio problem: Sam asks the waiter how long does the wheatgrass take to work into one's system, but the last sentences are played with a side shot of her where she's not mouthing the lines.
Answer: A popular brand of sexual lubricant. See http://www.k-y.com/index.jsp.
J I Cohen