HOWTO: Set Main Application Font in PyGTK

[Google Mike]

Unfortunately, Pádraig, the main font change is the /only/ way to
change the font on a radio button item. The FAQ also mentions that
this is one of those things that cannot be changed individually.
However, the rest of the FAQ was very enlightening and helped me
complete my project, which was a user-friendly GUI front-end for
PostgreSQL that's way better than phpAdmin III.