package squid 2.7.STABLE9-4ubuntu4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[dwan]

Failed to install

ProblemType: Package
DistroRelease: Ubuntu 11.10
Package: squid 2.7.STABLE9-4ubuntu4
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Uname: Linux 2.6.38-8-generic-pae i686
ApportVersion: 1.23-0ubuntu3
AptOrdering: squid: Configure
Architecture: i386
Date: Fri Oct 21 23:47:31 2011
DpkgHistoryLog: Start-Date: 2011-10-21 23:47:30
DpkgTerminalLog:
 Setting up squid (2.7.STABLE9-4ubuntu4) ...
 chown: invalid user: `proxy\r:proxy\r'
 dpkg: error processing squid (--configure):
  subprocess installed post-installation script returned error exit status 1
DuplicateSignature:
 Setting up squid (2.7.STABLE9-4ubuntu4) ...
 chown: invalid user: `proxy\r:proxy\r'
 dpkg: error processing squid (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu-Server 11.04 "Natty Narwhal" - Release i386 (20110426)
SourcePackage: squid
Title: package squid 2.7.STABLE9-4ubuntu4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to oneiric on 2011-10-21 (0 days ago)

[Ben Howard (darkmuggle-deactivatedaccount)]

Can you please provide steps for duplicating? Using a virgin installation, I was unable to duplicate this bug.

--

Setting up squid-langpack (20110707-1) ...
Setting up squid-common (2.7.STABLE9-4ubuntu4) ...
Setting up ssl-cert (1.0.28) ...
Setting up squid (2.7.STABLE9-4ubuntu4) ...
Creating squid spool directory structure
2011/10/21 17:54:44| Creating Swap Directories
squid start/running, process 11138

[Launchpad Janitor (janitor)]

[Expired for squid (Ubuntu) because there has been no activity for 60 days.]