Hi
I use the Sigil plugin
ODTImport to produce either EPUB2 or EPUB3. One of my latest EPUB2 (with xhtml files) has been judged by Sigil -using F7- as having no problems (well formed), the Calibre editor has the same opinion (minus a warning about the naming of font files) and EPUBCHECK has absolutely no remark about this EPUB.
However, Sigil on opening this same EPUB gives a warning and tells me that he can't update the book because one of the files has a badly formed html. I can nevertheless save the book.
If I let him correct ("mend all html files") this file (it's a table covering several pages), it will add some tags (like "<colgroup>" enclosing two "<col>" tags, or "<tbody>" enclosing all "<tr>" tags) which seem to be useful but not really necessary.
My question is: how can an ebook be at the same time well and badly formed?
