That’s what Sue Rostoni has said on StarWars.com:
There was a printing error — the printer used an ink that backfired and made some of the pages stick together, so the book was recalled after it was released. It will be reprinted using a more stable ink and will be released in October 2011. Many of the books found their way to market, so if you have one and the pages stick to the point that you’re not comfortable with it, you can return it and get the new one when it comes out.
I guess it’s kind of hard to get a new printing slot this close to the holidays?