The ebuild tried to bring in GTK+ v1.2 on my system, where GTK+ 2 is already installed. Presumably it did this because they slot, and 1.2 is listed first in the ebuild. Also, the preferred GTK+ version is not passed to the configure script, which will result in an 'automagic dependency' in some form. I'd suggest just dropping GTK+ 1.x support in this system.
fixed in cvs.