dev-python/gnome-python-extras forces a downgrade of www-client/mozilla-firefox-3.* to www-client/mozilla-firefox-2.* (By masking firefox, I found out, that gnome-python-extras needs firefox-2.*) !!! All ebuilds that could satisfy "=www-client/mozilla-firefox-2*" have been masked. (dependency required by "dev-python/gnome-python-extras-2.19.1-r1" [installed]) So everytime I want to update world emerge wants to downgrade firefox. Maybe allowing firefox-3.* in gnome-python-extras would be a solution. Reproducible: Always Steps to Reproduce:
Set xulrunner -firefox in your make.conf USE flags, then remerge gnome-python-extras. That should fix it. If not, reopen.