Secret sex - S1-E6
Continuity mistake: Samantha and Carrie are hanging Carrie's poster in her apartment. In one shot, the whole poster is pinned to the wall and in the next shot, the bottom left part of the poster is curling up. After another shot of Samantha, the poster is pinned perfectly to the wall again.
Secret sex - S1-E6
Continuity mistake: When Carries goes to Big's place to say goodbye she rises both arms. A shot later the right one is lowered. This changes back and forth.
Secret sex - S1-E6
Continuity mistake: When Big hugs Carrie her left hand is right next to her collarbone. A shot later her hand is around his body.
Secret sex - S1-E6
Continuity mistake: When Samantha is holding the poster against the wall she puts her left hand on the paper. In the following shot most of the hand lies on the wall.
Answer: Yes, it is.