Strange behaviour of TOC for one character
I've made several ePub-books in Esperanto. The special characters (ĉ ĝ ĵ ŝ ŭ ...) do not give any problem after import in Calibre. But in one particular book all the ŭ-characters are substituted by a Chinese character. I cannot figure out why. In all my other books the ŭ-characters in the TOC show how it should be.
I've looked to the original toc.ncx file in the ePub over and over again, and I see no difference in comparison to other toc files that behave properly.
The problem is visible after I add an ePub book to Calibre, before any conversion to another format.
Does someone have an idea where to look? Thanks!