after checking the font files and finding them to have ok meta data (posting the same thing over and over again does not help anybody serge...
) i found this working for me and my H2O:
.extracted bookerly and ember from the oasis update file (explained in a earlyer post in this thread)
.renamed the files as follows:
Bookerly-Regular -> Bookerly-a.ttf
Bookerly-Italic -> Bookerly-b.ttf
Bookerly-Bold -> Bookerly-c.ttf
Bookerly-BoldItalic -> Bookerly-d.ttf
Amazon-Ember-Regular -> Amazon-Ember-a.ttf
Amazon-Ember-Italic-> Amazon-Ember-b.ttf
Amazon-Ember-Bold -> Bookerly-c.ttf
Amazon-Ember-BoldItalic -> Amazon-Ember-d.ttf
.put the files into my font folder on the H2O
.disconnected and turned the H2O off completely (long holding the power button)
.restarting and now everything works as it should work...
sorry for my bad english - hope this helps...
PS:
works on my Glo HD too - files used for testing are .kepub.epub and .epub generated with calibre