Since I updated my K4nt to 4.1.0 one of my books
http://www.amazon.com/gp/product/B00...myk_ro_title#_
is now showing a lot different format. Bolder fonts but MUCH wider line spacing. I do not see a publishers font option. I can get around this ok by selecting smaller line spacing (still too wide btw) but I then need to adjust this again if I want to read another book.
This has not affected the way it appears on my k3kb or DXG so these are all I will read it on for now.