[QUOTEI am also seeing a new problem now, it has decided the book I am reading is now a preview copy and asks me to buy now when I try to turn to next page. I bought it once already I don't plan to buy it again. Tried deleting it and sync, doesn't come back, and it is now gone from my library on the web site too! Guess I will have to read it on my touch and remember not to sync that until after I finish reading that book. Glad I keep backups of the epubs.[/QUOTE]
Same here, I have 3 books that I have already purchased that are now listed has previews.

I tried to download them and it worked without more charges but they come back as previews when I open my Vox after a charge

Anybody else had that problem?