Doesn't update ALL fonts

In the new Twenty Thirteen default theme for WordPress 3.6, this plugin doesn’t update ALL the fonts. The widget titles, archive page titles, and “leave a reply” comment section text, still show the slanty-sans-serif font that comes default with the Twenty Thirteen theme.

See screenshots of the problem areas (that I’ve found so far):
http://imgur.com/J2mIdio
http://imgur.com/fxK9vkj
http://imgur.com/wtIysI9

Great plugin, otherwise!

http://wordpress.org/plugins/wp-google-fonts/