Load the KF8 into Calibre's Editor and see what fonts are being embedded. Chances are you won't need or want them. But if you do, you may be able to fix them by using KindleUnpack > ePub and load the ePub into Sigil and right click on the fonts to try to remove the obfuscation. Then you can either edit in Sigil or go back to the Calibre editor.
|