Unpacking squid3 (from .../squid3_3.1.19-1ubuntu3_amd64.deb) ...
Selecting previously unselected package squid.
Unpacking squid (from .../squid_3.1.19-1ubuntu3_amd64.deb) ...
Processing triggers for ureadahead ...
Processing triggers for ufw ...
Processing triggers for man-db ...
Setting up squid3 (3.1.19-1ubuntu3) ...
Creating Squid HTTP proxy 3.x spool directory structure
2012/05/07 18:46:40| WARNING: (B) '::/0' is a subnetwork of (A) '::/0'
2012/05/07 18:46:40| WARNING: because of this '::/0' is ignored to keep splay tree searching predictable
2012/05/07 18:46:40| WARNING: You should probably remove '::/0' from the ACL named 'all'
2012/05/07 18:46:40| ERROR: Directive 'upgrade_http0.9' is obsolete.
2012/05/07 18:46:41| cache_cf.cc(381) parseOneConfigFile: squid.conf:2978 unrecognized: 'broken_vary_encoding'
2012/05/07 18:46:41| ERROR: Directive 'extension_methods' is obsolete.
dpkg: error processing squid3 (--configure):
 subprocess installed post-installation script returned error exit status 1