Hi ! Is the kobo_extra.css still there ? Is the custom CSS of the plugin correctly checked ? Have you ‘hyphanate this’ the book before sending it to the device ?
I’m wondering that for kepubs we probably need to force text-align:justify; on the text and deactivate all alignement in the Aa menu of the book. Is your book setting on full justify (it’s not, I checked it - so it need one more step : change the text alignment with calibre for a full justify one and disable the justification in the book’s Aa menu on the device) ?
I added soft hyphen myself and the plugin added them correctly :
no soft hyphen before ‘d’ :
https://www.dropbox.com/s/qkrig3ngb4...51.46.png?dl=0
soft hyphen at the right place :
https://www.dropbox.com/s/hl2v6t1gxu...52.08.png?dl=0
I’ll try on a gHD as soon as possible.