Hello. I seem to be having the same problem as a number of people here. When I click on "Font Settings" nothing happens. I've tried clicking from both my site and from the admin dashboard.
This is on a fresh wordpress 3.5.1 install and the only plugins I'm using are:
BWP Google Sitemap
Front End Upload
I've disabled these plugins so that yours is the only one and it doesn't work. I've also installed both ways, through the installer and manually uploaded via FTP.