Error 127.0.0.1: no route to host

I updated my 9.0-current amd64 today on rev. 204915 and start
to get errors like this

127.0.0.1: no route to host

I boot using kernel.old and everything back to normal. I don't know
exactly revision of my kernel.old because last change made on
sys/conf/newvers.sh simply removed this information from my
uname, see:

FreeBSD botelhor.bplab.local 9.0-CURRENT FreeBSD 9.0-CURRENT #1: Mon
Mar  8 15:52:59 BRT 2010
root_at_botelhor.bplab.local:/usr/obj/usr/src/sys/GARGA  amd64

I just know it was built yesterday about 18:00 UTC

Is there any other way to get this information?

Let me know if you need more information about my environment.

Regards
-- 
Renato Botelho