package libqtcore4 4:4.8.1-0ubuntu4.1 failed to install/upgrade: conffile './etc/xdg/Trolltech.conf' is not in sync with other instances of the same package

[joan sanchis]

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ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libqtcore4 4:4.8.1-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.2.0-24.38-generic 3.2.16
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Sun May 27 23:45:18 2012
ErrorMessage: conffile './etc/xdg/Trolltech.conf' is not in sync with other instances of the same package
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: qt4-x11
Title: package libqtcore4 4:4.8.1-0ubuntu4.1 failed to install/upgrade: conffile './etc/xdg/Trolltech.conf' is not in sync with other instances of the same package
UpgradeStatus: Upgraded to precise on 2012-05-20 (7 days ago)
modified.conffile..etc.xdg.Trolltech.conf:
 [qt]
 4.8\libraryPath=/usr/lib/kde4/plugins
mtime.conffile..etc.xdg.Trolltech.conf: 2012-04-11T10:57:48