The fonts are in seperate files; just not on the user side of the Kobo.
You need to expand the tgz file from the upgrade and look within it. Fonts are in
\usr\local\Trolltech\QtEmbedded-4.6.2-arm\lib\fonts
Code:
21/11/2013 11:58 256,224 Amasis-Bold.ttf
21/11/2013 11:58 308,800 Amasis-BoldItalic.ttf
21/11/2013 11:58 312,880 Amasis-Italic.ttf
21/11/2013 11:58 248,080 Amasis.ttf
21/11/2013 11:58 56,544 Avenir-Bold.ttf
21/11/2013 11:58 50,560 Avenir-BoldItalic.ttf
21/11/2013 11:58 49,760 Avenir-Italic.ttf
21/11/2013 11:58 54,704 Avenir.ttf
21/11/2013 11:58 274,560 Caecilia-Bold.ttf
21/11/2013 11:58 281,344 Caecilia-BoldItalic.ttf
21/11/2013 11:58 284,928 Caecilia-Italic.ttf
21/11/2013 11:58 291,632 Caecilia.ttf
21/11/2013 11:58 78,864 Dyslexie-Bold.ttf
21/11/2013 11:58 81,872 Dyslexie-BoldItalic.ttf
21/11/2013 11:58 86,960 Dyslexie-Italic.ttf
21/11/2013 11:58 83,360 Dyslexie.ttf
21/11/2013 11:58 134,304 georgia.ttf
21/11/2013 11:58 137,744 georgiab.ttf
21/11/2013 11:58 123,056 georgiai.ttf
21/11/2013 11:58 123,504 georgiaz.ttf
21/11/2013 11:58 54,288 GillSans-Bold.ttf
21/11/2013 11:58 48,336 GillSans-BoldItalic.ttf
21/11/2013 11:58 48,304 GillSans-Italic.ttf
21/11/2013 11:58 54,272 GillSans.ttf
21/11/2013 11:58 6,142,864 Gothic MB101.otf
21/11/2013 11:58 108,176 KoboNickel-Bold.ttf
21/11/2013 11:58 100,256 KoboNickel-BoldItalic.ttf
21/11/2013 11:58 93,024 KoboNickel-Italic.ttf
21/11/2013 11:58 97,824 KoboNickel.ttf
21/11/2013 11:58 160,160 Malabar-Bold.ttf
21/11/2013 11:58 144,048 Malabar-BoldItalic.ttf
21/11/2013 11:58 152,992 Malabar-Italic.ttf
21/11/2013 11:58 165,344 Malabar.ttf
21/11/2013 11:58 32,144 OpenDyslexic-Bold.otf
21/11/2013 11:58 56,592 OpenDyslexic-BoldItalic.otf
21/11/2013 11:58 49,632 OpenDyslexic-Italic.otf
21/11/2013 11:58 28,192 OpenDyslexic-Regular.otf
21/11/2013 11:58 9,449,936 Ryumin.otf
but I seem to recall they are either encrypted, or obfusticated.