I think the time is mature to ask for another step of Gentoo/ALT 
improvement ;)
Currently ebuilds uses a sed syntax that's mostly GNU sed 4 compatible, but 
incompatible with BSD sed for instance. This is usually fine as we aliases 
sed to gsed in our bashrc so that the problem in sed calls is removed.
The main problem happen with sed when called by xargs or by find, as that 
ignores the aliases set in bashrc.
What I'd like to ask is, if possible, to start using gsed instead, that's 
present on both GNU and other userlands with current stable version of sed 
(4.1.4; ppc-macos has no problem as the 4.0.9 version uses gsed anyway).

It might require to change the dependency over >=sys-apps/sed-4.1.4, but that 
would help making portage a bit cleaner IMHO (instead of relying on sed being 
the executable you need, it make sure you're using a GNU sed version) and 
solves quite a few headaches for us.

Comments about this? (Please don't tell me to do a GLEP about this)

-- 
Diego "Flameeyes" Pettenò - http://dev.gentoo.org/~flameeyes/
Gentoo/ALT lead, Gentoo/FreeBSD, Video, AMD64, Sound, PAM, KDE