Plot hole: When the girl looks at the photos of Martin and his father while on the business trip, Martin is seen with his father and while wearing his boarding school sweater. But Harriet says later that he wasn't sent to boarding school until after their father was killed. Therefore, the sweater would not have been a clue in the earlier part of the movie.
The Girl with the Dragon Tattoo (2009)
1 plot hole - chronological order
Directed by: Niels Arden Oplev
Starring: Noomi Rapace, Michael Nyqvist, Lena Endre, Sven-Bertil Taube, Ewa Froling
Continuity mistake: When the killer's truck drives off the bridge, the right headlight gets destroyed and goes out during the roll. A few seconds later, it is lit again. (01:55:35)
Dirch Frode: What can you tell me about Blomkvist?
Lisbeth Salander: Everything is in the report.
Dirch Frode: The short version.
Lisbeth Salander: Blomkvist got the nickname Kalle Blomkvist when he solved a bank robbery in the 80s. He's a very public person with no major secrets. Read the newspaper articles.
Dirch Frode: But does he have any secrets?
Lisbeth Salander: Everyone has secrets.