Mikael Blomkvist: What are you doing?
Lisbeth Salander: Reading the reviews.
Mikael: But they're embargoed!
Perhaps you've heard about the kerfuffle with the breaking of The Girl With the Dragon Tattoo embargo? Usually these behind-the-scenes details are kept private but what happened was simply that David Denby ran his review of The Girl With the Dragon Tattoo early since he works for a weekly magazine rather than a daily blog and according to this thorough roundup at The Hollywood Reporter he felt he had to cover some of the important Christmas movies early (space and time limitations) else wait til January for some of them. Sony got very very angry even though the review was positive and basically a love letter to Rooney Mara who I can confirm --- no wait, I can't... I'm under embargo! In the end this amounts to nothing so much as free publicity for Dragon Tattoo and free publicity for David Denby and The New Yorker so everyone wins... though you'll surely read differently elsewhere since people like to get on soapboxes about such things.
Scott Rudin claims that Denby will be banned from his future movies but embargos are broken every year and nothing happens to anyone who breaks them. The studios are so inconsistent about how they handle them from movie to movie -- and even often from journalist to journalist on the same movie -- that it's not always easy to take them seriously. I always obey them but this is only because I'm polite and from the Midwest. But I wish I didn't ;) Playing by the rules generally doesn't help you and you may have heard that 'there is no such thing as bad publicity'? You've heard it because it's true.