First, viewing your listing as a guest, your current guidebook is totally visible, so that's at least not broken.
From the host's perspective, AirBnB has definitely changed the behavior just today. My input interface looks a lot different, although i think it still works mostly the same. They've fiddled the layout and they've altered the set of categories that you could slot things into. (And, I have to say, the choices are now poorer than before. For example, they've lumped Cafes and Coffee Shops together, eliminated Shops, eliminated Bars and Clubs, eliminated Groceries, eliminated museums or such, have both Dessert Shops AND Bakeries [redundant?] and added the amorphous "Everything Else" and the nearly useless Street Markets.) It also looks like I'll have to go back in and recategorize everything whose category was eliminated. All in all, these changes seem to add little other than some confusion factor. Why they do this crap is beyond me.
Actually, it's even more confusing than this. As I play around with it more, there appears to be a layered hierarchy of categories. Most of the stuff i said above applies to the higher category of "Food Scene". Other stuff seems to be in other parent categories, such as "Drinks and Nightlife".
So they've actually greatly expanded the labels you can slap on things. In the end, this is probably a good thing, but it sure as heck is confusing at first!
Also, I no longer see an option to produce a printed copy, which I find far more usefukl for guests than the online version (which NO ONE has ever used as far as I know).