package libpolkit-backend-1-0 0.105-4ubuntu2 failed to install/upgrade: subprocess dpkg-split returned error exit status 2

psensor crashes on login to machine (p4 1 gb DDR2700); Ubuntu 14.04 LXDE installed on ubuntu. not sure why it's starting up.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libpolkit-backend-1-0 0.105-4ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic i686
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: i386
Date: Sun May 10 12:19:40 2015
DuplicateSignature: package:libpolkit-backend-1-0:0.105-4ubuntu2:subprocess dpkg-split returned error exit status 2
ErrorMessage: subprocess dpkg-split returned error exit status 2
InstallationDate: Installed on 2014-05-24 (351 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417)
SourcePackage: policykit-1
Title: package libpolkit-backend-1-0 0.105-4ubuntu2 failed to install/upgrade: subprocess dpkg-split returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)