On Thu, 2011-04-28 at 16:19 +0200, Jesús J. Guerrero Botella wrote: > gtk+ 3.x is not used by gnome versions in portage (2.x). If you don't > know if you need it, then you don't need it.
Gnome3 is slowly making its way into portage, and so so is bringing with it packages that depend either explicitly or optionally on gtk3, e.g. libunique-3.0.0 clutter-gtk libnotify-0.7.2 gtkmm-3.0.0.
