[gentoo-user] strangeness with emerge -uD world

[»Q«]

I'm using portage-2.1.4.4.

$ emerge -pqu world
[ebuild     U ] www-client/mozilla-firefox-3.0.1 [2.0.0.16]

but 

$ emerge -pqu --deep world

gives no output.  I've never seen --deep cause fewer updates.  What am
I missing?  I have EMERGE_DEFAULT_OPTS="--with-bdeps y" in make.conf,
and I don't know what more info to post.

-- 
»Q«
     Kleeneness is next to Gödelness.