I converted an epub2 to epub3, and it works fine in most situations.
However, ePubcheck complained that there were some named entities --   -- instead of numeric, and Azardi reader choked on those too.
Not hard to fix manually, but could the plugin convert such characters?
(Personally I much prefer named entities, don't know why epub3 is against them. Maybe ePub4 will be an all binary format.)
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