2011/5/29 Kevin Kofler:
For GTK+ 3 applications, there's only one choice at this time:
Adwaita, the
default theme from GNOME 3.
It is disturbing though that Fedora 15/Rawhide do not provide a GTK2
engine matching the GTK3 Adwaita look to make the appearance of
respective applications consistent. Unfortunately, GTK2 currently
defaults to using the Clearlooks engine. ~C