Once installing gimp, gtk-perl was being pulled in. emerge panicked, trying to load 'subpackage' gdkpixbuf, suggesting that it guessed a wrong name. sorry no error source.
do you have gdk-pixbuf?
I had the same problem. It seems that gdk-pixbuf is a dependency of gtk-perl, but it's not mentioned in the ebuild. I added media-libs/gdk-pixbuf as a dependency in my local copy of portage/dev-perl/gtk-perl/gtk-perl-0.7008-r3.ebuild and then gtk-perl built without further problems. Suggest that this is corrected in the official distribution. (I have the -gnome USE setting, in case that is relevant.) See also <http://forums.gentoo.org/viewtopic.php?t=2851>
Thanks for that Ian. I have added it as a dep and things should work in the -r4 release :)