There's a bit in the American movie where Blomkvist fumbles with his laptop, trying to get the right program to come up. Lisbeth gives the most impatient eye-roll as Blomkvist talks and curses to himself. Though it's subtle, it's just about the only bit of the movie Played for Laughs. (Of course, this is followed immediately by the cat, making for a bit of Mood Whiplash.)
The entire exchange when Erika walks in on Blomkvist and Cecilla Vanger starting with an exasperated "Oh good Lord" and ending with Erika asking if she should leave and take a walk and Blomkvist suggesting that she make coffee for the three of them while he and Cecilla get dressed.
Blomkvist's reaction upon being told that a background check was done on him. Something about his delivery of "I want to read that".
Frode: [uncomfortable as Lisbeth's boss facepalms] No, you're right to not include that.
The Girl Who Played with Fire:
Lisbeth visiting her rapist guardian and once again making making him whimper in fear.
When Bublanski is talking to Mikael, he asks why people call Mikael "Kalle Blomkvist". Mikael counters by asking why they call Bublanski "Officer Bubbles."
The Girl Who Kicked the Hornet's Nest:
Mikael jokingly emails Lisbeth that once the trial is over, he's going to start a group of all the people who've helped her and call it "The Knights of The Idiotic Table", and that they will meet once a year to talk crap about her over dinner. And no, she's not invited.