At one point in the movie (About 45 minutes in I think), a crewman tells Worf that the Borg have taken control of decks 26 through 11. (I think it was 11. It's been a while since I've seen it.) Then, about 20 or so minutes later, when Lily is following Picard through the ship, she asks how big the ship is, and Picard replies that there are 24 decks.
Now is it just me, or did the ship shrink a couple decks all of a sudden?