LJ failures

OK, why is it that Firefox is giving me 502 (bad gateway) from LJ and asserting that it's them, not me, but I can access the site from Safari running on the same machine? I don't particularly want to use Safari; all my usability improvements are already set up in Firefox.

(I guess I should mention that I'm also on Dreamwidth with this user name, but I haven't been posting there so far.)