--- Invalid atom in /etc/portage/package.accept_keywords: =dev-texlive/*-2012* --- Invalid atom in /etc/portage/package.mask/package_mask.conf: ~kde-base/*-4.10.5 --- Invalid atom in /etc/portage/package.mask/package_mask.conf: =dev-qt/*-*4.8.5* package.mask shows the correct file. package.accept_keywords does not, the error is inside /etc/portage/package.accept_keywords/texlive.conf I did not test the other files (package.use, package.unmask), but probably this error can be found there, too.
This is fixed in git: http://git.overlays.gentoo.org/gitweb/?p=proj/portage.git;a=commit;h=d2447ceada5e2e56ced9cfe25c15a88ba8074969
This is fixed in 2.2.2.