Continuity mistake: At the beginning of every show we see Carrie walking down the street and she gets splashed by the bus. First the bus has people on it, then in the next shot they all disappear.
Continuity mistake: In the opening credits, when Carrie gets splashed by the bus, her pink tanktop changes from slightly wet to soaked in half a second.
Continuity mistake: Samantha is wearing a tweed suit. In several of the takes, the back of the suit is shredded. Then in other shots, it is fine.
Continuity mistake: When the real estate agent is about to show the views she hands a brown folder and a pair of red sunglasses to Sam. In the following shots the glasses are gone. Sure Sam had five seconds to put them away, but she didn't move from the spot, plus her hands were busy all the time.