Quote:
Originally Posted by stweb
- Opened the epub in Sigil - the special characters were visible in the code editor view.
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If the special characters were visible in Sigil, it's most likely a font issue. If you've saved a copy of the ePub, try to figure out what font was assigned to body text and/or paragraphs. (Usually Calibre adds a <span class="CalibreX">...</span>.)
If a font was assigned, delete the line with the definition from the stylesheet and embed a free font with support for curly quotes, for example
Charis SIL.
Install the font on your system (or use an installed font), open Calibre and select
Common Option > Look & Feel > Embed font family and do an epub to epub conversion. This'll embed the font.