jim said:
>   In this case all the epub viewers agree not to display
>   his generated codes, so in this case it's the viewer-apps
>   which are agreeing. 

so maybe this is a case where calibre insists on doing it right,
and none of the viewer-apps agree.  i don't know.  i don't care.
this is a problem for the people who support the .epub format,
and i'm not one of those idiots.  i have no craving for confusion.


>   The codes are in there, they are just not displaying, so
>   I'm not sure what is wrong with the epub he is generating.

if "the codes are in there", then why would you assume that
there is something wrong with the .epub?  if the problem is
with the display, then the cause might be the viewer-apps...

too bad you don't have a reference implementation.  sorry.

-bowerbird