package libgif4 4.1.6-9ubuntu1 failed to install/upgrade: './usr/share/doc/libgif4/AUTHORS' is different from the same file on the system

It crashed durring installation.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libgif4 4.1.6-9ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
Date: Mon Aug 20 18:37:55 2012
DpkgTerminalLog:
 Unpacking libgif4:i386 (from .../libgif4_4.1.6-9ubuntu1_i386.deb) ...
 dpkg: error processing /var/cache/apt/archives/libgif4_4.1.6-9ubuntu1_i386.deb (--unpack):
  './usr/share/doc/libgif4/AUTHORS' is different from the same file on the system
DuplicateSignature:
 Unpacking libgif4:i386 (from .../libgif4_4.1.6-9ubuntu1_i386.deb) ...
 dpkg: error processing /var/cache/apt/archives/libgif4_4.1.6-9ubuntu1_i386.deb (--unpack):
  './usr/share/doc/libgif4/AUTHORS' is different from the same file on the system
ErrorMessage: './usr/share/doc/libgif4/AUTHORS' is different from the same file on the system
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
SourcePackage: giflib
Title: package libgif4 4.1.6-9ubuntu1 failed to install/upgrade: './usr/share/doc/libgif4/AUTHORS' is different from the same file on the system
UpgradeStatus: No upgrade log present (probably fresh install)