Continuity mistake: When the girls starts having lunch, Sam's arm is raised then suddenly lowered. (00:12:40)
Continuity mistake: Charlotte tells Harry "you changed your mind with the Jewish thing" while she caresses his chest and his hand is lowered. A shot later his hand is suddenly on his chest and his fingers are entwined with Charlotte's.
Continuity mistake: When Charlotte wakes Harry up, his left hand is on his tummy. From a different angle his hand is by his side and he is rising it again.
Continuity mistake: Steve grabs the baby wipes and leaves none in the box. A shot later a wipe is magically sticking out.
Continuity mistake: When Miranda tries to clean her forehead, the baby's head lies on her collarbone. A shot later the head is away and staring at Steve. Then we go back to the first shot and the baby is lying against the collarbone again.
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: Charlotte drinks from her glass but her arm is lowered a shot later. (00:05:45)
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 bumps into the dogs, the dog walker is sometimes on the middle of the streets, others next to the building, others crouching and others standing still. No continuity. (00:01:05)
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.
Visible crew/equipment: Sam says "this party's gonna be amazing, A-list" and a black shade used for lighting is reflected on her sunglasses. (00:09:27)
Continuity mistake: During brunch outside, Miranda's bite on her muffin changes shape between the side and the front shot.
Continuity mistake: Carrie asks Big what he thought abut the book while he lowers his glass. A shot later his glass is raised and he is lowering it again. (00:21:14)
Continuity mistake: During the girls' chit-chat, the amount of ice tea in Miranda's glass suddenly decreases between shots.
Continuity mistake: While eating outside with Miranda and her baby, Carrie takes a french fry to her mouth, but her hand suddenly disappears in the following shot.
Continuity mistake: Carrie kisses Big and caresses his right cheek. A shot later her hand is nowhere to be seen.
Continuity mistake: After Mr. Big swallows the gum he puts his left hand on his chest. A shot later it disappears.
Answer: A popular brand of sexual lubricant. See http://www.k-y.com/index.jsp.
J I Cohen