I'm having similar problem as "n952162" upgrading an old (last updated 1.8-year ago) It sync OK, updated the profile.
Looking instruction on this page: https://wiki.gentoo.org/wiki/Upgrading_Gentoo root #mv /usr/portage /usr/portage.latest root #tar xjpf /path/to/portage-20090720.tar.bz2 -C /usr root #emerge --update --oneshot portage but that portage "portage-20090720.tar.bz2" seems old; what is the latest one?
