Other mistake: E-mails between Salander and Blomvkist on pages 311 and 312 (2009 MacLehose Press hardback) are repeated word for word on pages 370, 371.
Plot hole: Mikael Blomkvist figures out Lisbeth Salander's code for her apartment's alarm system is 9777. This based on the numeric pads (found on phones) and the letters "WASP". However, the letters "WASP" would give the number 9277, not 9777. This at least happens in the Norwegian version of the book.Mortug