Continuity mistake: As the group are discussing Samantha's nude photos in the restaurant, a salad Miranda has ordered arrives at the table. Just after Carrie says "that we know of" you can see the waitress place both the salad and a ramekin of dressing onto the table from behind Miranda. The shot then cuts to the front and the waitress is shown putting the ramekin down for the second time.
Plot hole: In this episode Carrie runs into Aidan, who now has what looks to be about a 6 month old baby (Tate). This doesn't seem possible, as Carrie and Aidan would have only broken up about a year ago, and Miranda was around 6 months pregnant when they broke up. Brady is only about 5 months old at this point in the series, leaving Aidan only roughly 8 months to have this baby - but Aidan lay in bed for about a month and then dated Nina Katz for awhile. Timeline just doesn't seem to fit.