Thank you for the tips!
I give in! The basic feature which should work since the
CSS version 2.1 seems to have lower importance like other important features typical for books (orphans, widows). Frankly, this pi.. me off. This is probably because of the web-based nature of ebooks—developers like to invent (from the reader’s point of view) nonsenses like media overlays or audio, ruby, video, invisible red piglets support but such basic things like better typography support keep them calm
With this on mind I am wondering how long we would wait for the support of other important things of newer CSS version (-epub-hyphens and so on).