Originally Posted by montalex
I have upgraded, and there are no new fonts, only more clarity in same fonts, I believe. It looks good, and my Kindle seems a bit faster.
There are no new user selectable fonts, however, the default serif, sans serif and monospaced fonts have all been updated (added kerning pairs, OpenType layout tables etc.) You won't see a change unless you read books with previously unsupported Unicode ranges. E.g. Arabic, Hebrew, Tengwar or Klingon.
Hebrew is now fully supported, while Arabic can only be displayed without vowel signs.