Continuity: When Miranda and Steve are talking by her apartment door on New Year's Eve, the deadbolt lock changes from open to closed several times without being touched.
Continuity: When Samantha brings Carrie breakfast in Mexico, the teapot on the tray changes between shots from an ornate to a simple design.
Continuity: When Samantha is lying on the table covered in sushi and the phone rings, she moves and the piece of sushi on her shoulder falls down. There is a visible piece of double sided stick tape there to hold the sushi in place. In the scene time elapses, but it is understood Samantha never leaves the table and remains covered in sushi. When the shot returns to her close up, the piece of tape has been removed from her shoulder.
Continuity: The size of Carrie's piece of cake at Charlotte's baby shower changes back and forth between shots.
Continuity: As Carrie, Samantha, Miranda and Charlotte leave Charlotte's apartment for the church, we see them all enter the limousine. As the limousine arrives at the site of the wedding and pulls up to the curb, we can clearly see that the limousine is empty.
Revealing mistakes: The license plates on Big's Mercedes-Benz are obviously fake. New York State plates have three letters and four numbers on them. The plates on Big's car have three letters, and then a mix of letters and numbers for the last four characters.
Continuity: After the waiter in Mexico gives Charlotte her bottled water (and she is shown wiping off the mouth of it), his tray shown in the next shot still has the bottle of water on it as he places another margarita on the table.
Continuity: In the scene where Miranda and Steve are having dinner, the foam on Miranda and Steve's lips change shape and position.
Continuity: In the scene where Carrie is making lists to plan the wedding the position of her Sharpie marker (clipped to her tank top) changes position several time during the shot
Revealing mistakes: When the four girls are packing Carrie’s stuff into boxes, and Charlotte bumps into one of the stacks of boxes, it is obvious that they are empty.
Errors made by characters (possibly deliberate errors by the filmmakers): After Magda tells Miranda that she remembers a neighborhood being largely Ukrainian, Carrie's narration refers to the area as "Old Ukrainia" rather than Old Ukraine.