arm was dropped from mozilla when the mozilla-1.7.11-r3 was dropped. This broke gnome-extra/yelp, so I have temporarily dropped arm keywords from there too.
You should care more about getting www-client/seamonkey keyworded, see bug 137198.
I gave plenty of time for arm to mark 1.7.13 stable before removing 1.7.11-r3 which was infested with major security issues.
It does not have to be marked stable, just testing would have been satisfactory here. You should not have even dropped the testing keyword on such updates (unless they were really major changes?)
http://www.gentoo.org/cgi-bin/viewcvs.cgi/www-client/mozilla/mozilla-1.7.12-r1.ebuild?rev=1.2&view=markup Please review as you will see I was not the original to drop keyword. If 1.7.13 works then seamonkey-1.0.2 should work as well for ya. If this is the case keyword seamonkey-1.0.2 as I will be bring it out of p.mask as of tomorrow evening.
seamonkey has arm love now