from config.log: Requested 'pygtk-2.0 >= 2.10.4' but version of PyGTK is 2.10.3
While on the subject of wrong dependencies, gimp-2.3.16 requires gtk-2.10.6 or later as opposed to gtk+-2.8 specified in DEPEND (seems to only matter for mips where gtk-2.10 is not stable yet)
I found it to work when keywording dev-python/pygtk-2.10.4 first.
Same here with: [ebuild R ] x11-libs/gtk+-2.10.11 USE="X jpeg tiff -debug -doc -xinerama" 0 kB [ebuild R ] dev-python/pygtk-2.10.3 USE="opengl -doc" 0 kB
Thanks for your report, fixed.