package libmng2:amd64 2.0.2-0ubuntu3 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration

[sean]

failure to install updates

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libmng2:amd64 2.0.2-0ubuntu3
ProcVersionSignature: Ubuntu 3.13.0-49.81-generic 3.13.11-ckt17
Uname: Linux 3.13.0-49-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.8
Architecture: amd64
Date: Tue Apr 21 14:09:02 2015
DpkgHistoryLog:
 Start-Date: 2015-04-21 14:08:28
 Upgrade: libdecoration0:amd64 (0.9.11.2+14.04.20140714-0ubuntu1, 0.9.11.3+14.04.20150122-0ubuntu1), compiz-gnome:amd64 (0.9.11.2+14.04.20140714-0ubuntu1, 0.9.11.3+14.04.20150122-0ubuntu1), compiz-core:amd64 (0.9.11.2+14.04.20140714-0ubuntu1, 0.9.11.3+14.04.20150122-0ubuntu1), compiz:amd64 (0.9.11.2+14.04.20140714-0ubuntu1, 0.9.11.3+14.04.20150122-0ubuntu1), libcompizconfig0:amd64 (0.9.11.2+14.04.20140714-0ubuntu1, 0.9.11.3+14.04.20150122-0ubuntu1), compiz-plugins-default:amd64 (0.9.11.2+14.04.20140714-0ubuntu1, 0.9.11.3+14.04.20150122-0ubuntu1)
 Remove: xscreensaver:amd64 (5.15-3ubuntu1)
DuplicateSignature: package:libmng2:amd64:2.0.2-0ubuntu3:package is in a very bad inconsistent state; you should reinstall it before attempting configuration
ErrorMessage: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
InstallationDate: Installed on 2014-12-28 (113 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: libmng
Title: package libmng2:amd64 2.0.2-0ubuntu3 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
UpgradeStatus: No upgrade log present (probably fresh install)