Are embedded fonts supposed to work in an ePub TOC?
The TOC is metadata, not part of the main flow of the ebook. In both the Desktop ADE and the Desktop Sony eBook Library, the TOC is never shown in the main text viewing pane but rather in separate sub-windows. I think this is also the case on an EZ Reader - essentially when you go to a TOC you are exiting the main view and going into a library view somewhat similar to how folder contents are listed.
A work around might be to add a "TOC" inside the body of the ebook using hyperlinks. This is how many MOBI ebooks used to do navigation, before an explicit TOC entry was added. If the problem with the standard font in the actual TOC is a lack of the required symbols, you could produce latinized versions or just drop most of the text (e.g. use chapter 1, chapter 2, etcetera). This could be in addition to the more complete internal TOC.
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