Public bug reported:
I hope this can help
ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: squid3 3.1.19-1ubuntu3.12.04.1
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic-pae 3.2.19
Uname: Linux 3.2.0-26-generic-pae i686
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu10
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https://bugs.launchpad.net/bugs/1015997
Title:
package squid3 3.1.19-1ubuntu3.12.04.1 failed to install/upgrade:
subprocess installed post-installation script