Originally Posted by DiapDealer
I think you'll find that the fonts are simply obfuscated, not corrupt. The embedded fonts still display fine when viewing the ePub in a reader capable of dealing with standard font obfuscation (such as ADE-based apps/devices).
If the fonts were obfuscated in the KF8 file, then they will be obfuscated in the ePub that Mobi_Unpack produces. This is not a bug ... it's a design choice. There's several easy ways to de-obfuscate those font files if that's something you have no qualms about doing, but you'll have to make that call (and do the homework) yourself. Mobi_Unpack won't do it for you.
Why not just leave the fonts alone? There's nothing wrong with them when looked at in the KF8. They can be viewed with Windows font viewer just fine. But in the ePub, no way. If it's a design choice, it's the wrong choice. Why screw with the fonts when there is no need of it? The idea is to remove all traces of DRM and whatnot and all this does is just add in a layer of crap that we don't need and we don't want. This makes the fonts no longer standard font files which is what they should be. Please take out this font fiddling and leave the fonts alone.