@bravosx...Your problem has now been fixed in v0.2.8 which has just been released. Your ebook now displays correct Polish in both the Book Browser and in the Table of Contents(content.xhtml).
When you run EpubCheck you might also get this Warning:
WARNING(PKG-012): File name contains the following non-ascii characters: ?. Consider changing the filename.
This is only a warning -- not an error. The above warning should be ignored and will not stop you uploading your ebook to Kindle or other epub vendors without errors(I have also tested this). This incorrect warning is probably because EpubCheck does not use utf8 to check internal epub file names.
Last edited by slowsmile; 01-16-2017 at 02:23 AM.
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