Comment 12 for bug 573853

Same issue. Pretty much stock /etc/squid/squid.conf

# dpkg -l squid
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============================-==============================-=====================================
ii squid 2.7.STABLE7-1ubuntu12 Internet object cache (WWW proxy cache)

# start -v squid
start: Job failed to start