[squid-users] hostname not determined automatically

I'm using the same squid3.conf on 4 proxies with differenz hostnames.
Back with 2.7 I didn't have to set
visible_hostname
explicitly. Squid would just use the hostname of the machine it was
running on.

With squid-3.0.STABLE19 all the error pages contain localhost instead
of the machine's hostname:
"Erzeugt am Thu, 06 May 2010 07:26:42 GMT von localhost (squid/3.0.STABLE19)"

# hostname -a
proxy-cvk-1

So what's wrong here?

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  [email protected] | http://www.charite.de