package libqtcore4 (not installed) failed to install/upgrade: conffile './etc/xdg/Trolltech.conf' is not in sync with other instances of the same package

[Qianqian Fang]

problem not fixed

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libqtcore4 (not installed)
ProcVersionSignature: Ubuntu 3.2.0-61.93-generic 3.2.55
Uname: Linux 3.2.0-61-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Sat May 10 00:21:34 2014
DpkgTerminalLog:
 Unpacking libqtcore4 (from .../libqtcore4_4%3a4.8.1-0ubuntu4.6_amd64.deb) ...
 dpkg: error processing /var/cache/apt/archives/libqtcore4_4%3a4.8.1-0ubuntu4.6_amd64.deb (--unpack):
  conffile './etc/xdg/Trolltech.conf' is not in sync with other instances of the same package
DuplicateSignature: package:libqtcore4:(not installed):conffile './etc/xdg/Trolltech.conf' is not in sync with other instances of the same package
ErrorMessage: conffile './etc/xdg/Trolltech.conf' is not in sync with other instances of the same package
InstallationMedia: Xubuntu 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140205)
MarkForUpload: True
SourcePackage: qt4-x11
Title: package libqtcore4 (not installed) failed to install/upgrade: conffile './etc/xdg/Trolltech.conf' is not in sync with other instances of the same package
UpgradeStatus: No upgrade log present (probably fresh install)