Portage is not able to write the file enlightenment.mo to /usr/share/locale/ja/LC_MESSAGES/ - if the file exists an unlink error is thrown by portage...
Please see http://forums.gentoo.org/viewtopic-t-315249.html for more information.
it seems that the fr & ja localizations (apparently the only ones...) are throwing access vioaltions. the build is trying to toss them straight into /usr/share
fixed in cvs
ok - emerge e runs fine again - thank you