It is not working for me: "calibre, version 1.46.0
ERROR: Unsupported file format: Editing files of type application/adobe-page-template+xml is not supported".
In content.opf I had this:
Code:
<item href="Misc/page-template.xpgt" id="pt" media-type="application/adobe-page-template+xml"/>
Whereas in the html files I had this (same epub):
Code:
<link href="../Misc/page-template.xpgt" rel="stylesheet" type="application/vnd.adobe-page-template+xml" />
Which matches the code change for this enhancement. So I changed content.opf to
Code:
<item href="Misc/page-template.xpgt" id="pt" media-type="application/vnd.adobe-page-template+xml"/>
which means I can now edit the xpgt.
My brief research suggest both forms (with and without the vnd prefix) are used, suggesting this requires a further code change to cater for the vnd prefix.