Carrie suggests that the girls smoke pot, and then asked the last time they had. Miranda said she thinks it was the last time she wore her skinny jeans (which she said was 1985). But on Season 3 Episode 15 "Hot Child in the City", she took the pot from Power Lad when leaving. The show ended with Miranda, Carrie and Samantha smoking in Carrie's apartment.
When the girls are in the club "bed" Samantha pours Carrie some champagne and she drinks it and puts it on the table. In the next shot we see Carrie's champagne glass refilled.
When Carrie is showing the post-it to the officer, her hand switches places on the window from one scene to the other.
Carrie's hair is much, much longer in this episode than in the previous episode. It also changes from straight to curly.