package libqtgui4 4:4.7.4-1ubuntu4 failed to install/upgrade: './usr/share/doc/libqtgui4/LGPL_EXCEPTION.txt' is different from the same file on the system

[userdce]

rebooted and it appeared

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libqtgui4 4:4.7.4-1ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-1.3-generic 3.2.0-rc2
Uname: Linux 3.2.0-1-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
Date: Tue Nov 22 14:05:04 2011
DuplicateSignature:
 Unpacking replacement libqtgui4:i386 ...
 dpkg: error processing /var/cache/apt/archives/libqtgui4_4%3a4.7.4-1ubuntu3_i386.deb (--unpack):
  './usr/share/doc/libqtgui4/LGPL_EXCEPTION.txt' is different from the same file on the system
ErrorMessage: './usr/share/doc/libqtgui4/LGPL_EXCEPTION.txt' is different from the same file on the system
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: qt4-x11
Title: package libqtgui4 4:4.7.4-1ubuntu4 failed to install/upgrade: './usr/share/doc/libqtgui4/LGPL_EXCEPTION.txt' is different from the same file on the system
UpgradeStatus: Upgraded to precise on 2011-11-23 (2 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Evan Huus (eapache)]

Removing all the files under /usr/share/doc/PKG-NAME/ and then rerunning apt-get -f allows everything to proceed and clean up properly.