Custom fonts doesnt work! Dont download!

I was working on a book till yesterday just fine, now updating to 2.1 all the fonts doesnt work on iPad! Everything is fine on the mac, but sending to iPad replaces all fonts to a default sans-serif.

I tried several things, all with NO success:
- export the project instead of previewing directly
- tried on iPad with iOS 6 and 7
- converted the fonts to TTF
- tried several other fonts, OTF, TTF, all original
- even tried to install the fonts as system font

I have no clue what is the problem, maybe a hidden license protection, but thats no sense. Even system fonts like Apple Chancery doesnt work. I am on a OS Lion.

Hope this gets fixed. Now the only solution is to find a older version to download.

andre_felipe about iBooks Author, v2.1