Version 0.1.5 – Ooops!
Such a restrictive exchange just causes errors where they were not.
IMHO adding "x" to the front was a better idea.
Now
name="calibre:cover" is changed to
id="calibrexcover"
a) loses meaning after re-opening in calibre
b) throws an error in the epubcheck
The names inside svg tag are case-sensitive:
viewBox and
preserveAspectRatio and after run plugin they are changed to lowercase (
viewbox,
preserveaspectratio).
And I will repeat it again,
Add Cover will fix these errors, but ... these are additional clicks