Originally Posted by chaley
From my reading, the tag is not added if catalog_epub_mobi_read_tag is empty. That is why I thought emptying that box on the catalog options would stop the tag from being added.
That stored gprefs value probably isn't being properly updated. That's obsolete code anyway, since the introduction of a broader set of 'read book' criteria.
I'll take a closer look when I have a moment.