the mimetype file for epub3 is invalide.
It contains :
<?xml version="1.0" encoding="UTF-8"?>application/epub+zip
it should be only : application/epub+zip
thanks and regards
example of mimetype
This appears to be an issue only with the Xalan processor, which cannot
produce output with method="text", which is needed for the css file. Try
using Saxon or xsltproc.
Because the Xalan processor does not properly support output method="text", it cannot produce valid epub3 output. So now the stylesheet checks to see if the processor is Xalan and exits if it is.