emerge -1av $(qlist -CI perl) !!! 'dev-perl/XML-Parser-2.36-r00.1' is not a valid package atom.
umm, is that even valid ? having multiple _pre/_rc/etc... is fine, but you can only have one -r and the # is integer, not floating point portage seems to barf on it as well ...
http://dev.gentoo.org/~grobian/gleps/glep-prefix.html#ebuild-changes-in-prefix see ebuild inter-revisions, it is a prefix extension/temporary hack, hence it being assigned to me ;)
not going to fix this, need to cope with the inconvenience for as long as we can't get rid of our overlay