I only included one font.
One thing I will also bring up, is whenever I embed fonts during a conversion, whenever I open the file in the editor, and click the check for bugs button, it gives me this error for every font that's successfully embedded:
Code:
CSS: Property: Not valid for profile "['CSS Fonts Module Level 3 @font-face properties']" but valid "CSS Fonts Module Level 3" value: normal [9:5: font-stretch] [page_styles.css]
If I upload to the IDPF validator, the epub validates whether I remove that from the CSS or not. But Calibre throws up that error every time a font is embedded.