package libpostproc52 (not installed) failed to install/upgrade: libpostproc52:i386 6:0.git20120821-4 (Multi-Arch: no) is not co-installable with libpostproc52 which has multiple installed instances

[Casey Todd]

it quit installing this package

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libpostproc52 (not installed)
ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
Uname: Linux 3.13.0-36-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
Date: Sun Oct 12 15:53:05 2014
DuplicateSignature: package:libpostproc52:(not installed):libpostproc52:i386 6:0.git20120821-4 (Multi-Arch: no) is not co-installable with libpostproc52 which has multiple installed instances
ErrorMessage: libpostproc52:i386 6:0.git20120821-4 (Multi-Arch: no) is not co-installable with libpostproc52 which has multiple installed instances
InstallationDate: Installed on 2013-04-17 (543 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
SourcePackage: libpostproc
Title: package libpostproc52 (not installed) failed to install/upgrade: libpostproc52:i386 6:0.git20120821-4 (Multi-Arch: no) is not co-installable with libpostproc52 which has multiple installed instances
UpgradeStatus: Upgraded to trusty on 2014-09-01 (41 days ago)