package libqtcore4 failed to install

package libqtcore4 (not installed) failed to install/upgrade: trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:amd64

ProblemType: Package
DistroRelease: Ubuntu 13.10
Package: libqtcore4 (not installed)
ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
Uname: Linux 3.11.0-18-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Sun Mar 9 21:06:19 2014
DuplicateSignature: package:libqtcore4:(not installed):trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:amd64
ErrorMessage: trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:amd64
InstallationDate: Installed on 2014-02-22 (15 days ago)
InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
SourcePackage: qt4-x11
Title: package libqtcore4 (not installed) failed to install/upgrade: trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:amd64
UpgradeStatus: No upgrade log present (probably fresh install)