Continuity mistake: The amount of feces on Miranda's forehead changes between the first time she smudges it on her forehead and half a second later when Steve warns her. This happens before the listed mistake that takes place when he wipes the poo off.
Continuity mistake: While having dinner with Harry, Charlotte grabs her bread and breaks it in half, then eats a bit. From the opposite angle she is grabbing the whole bread again and breaking it in half again.
Continuity mistake: While having lunch at the Meat Packing District, Sam grabs her lipstick but it disappears a shot later.
Continuity mistake: When Carrie exits the Wall Street subway station, the passers-by on the right are not continuous between shots.
Continuity mistake: When Carrie is running, the dalmatian is on the right side of the curb. A shot later it's on the left.
Continuity mistake: When Carrie runs late there's a man with a hat next to some flowers half a meter away. She keeps running and the man vanishes, only to reappear seconds later.
Answer: A popular brand of sexual lubricant. See http://www.k-y.com/index.jsp.
J I Cohen