[arspr]

Originally Posted by panmanthe2nd

You're right. I thought it had worked because the bit that I looked at was rendered properly but after looking at them more most of the diacritical marks are still just blank spaces.

I think it must be some kind of incompatibility. At least it's better than it was.

Last shots:

• Do you know that Kobos have two renderers? The common one for epubs and another one for Kobo's "enhanced" version of epubs (Kepubs). Try grabbing KoboTouch Extended Driver for Calibre which automatically converts your epubs into kepubs when sending them to your device. Maybe the kepub renderer (called ACCESS) could work even if the epub renderer (called RMSDK from Adobe) doesn't.
• Read the first two posts of this thread about the Calibre Editor. Here Kovid says that combining unicode characters should be avoided whenever possible. And more important that Calibre Editor normalizes them into single characters if possible. So you could try opening your books in the Editor, checking if your special characters have been collapsed into single ones and then performing any change, (add a space and remove it), in order to be able to save your book without combining characters, but already combined ones.