package libvisual-0.4-plugins 0.4.0.dfsg.1-5 failed to install/upgrade: libvisual-0.4-plugins:i386 0.4.0.dfsg.1-5 (Multi-Arch

[Veet Moha]

Description: Ubuntu precise (development branch)
Release: 12.04

libvisual-0.4-plugins:
  Installed: 0.4.0.dfsg.1-5
  Candidate: 0.4.0.dfsg.1-5
  Version table:
 *** 0.4.0.dfsg.1-5 0
        500 http://de.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status

Installed 11.10 Final without any dounloads checked (mp3 ore other updated during installation), then restarted and upgraded to 12.04 LTS. Installed severat other packages when upgrade was finished like vlc, gparted, weather indicator, etc. then restarted. Also changed the wallpaper to see if the lightdm will display the wallpaper associated to the user.
At restart lightdm displayed still the default background even though the the wallpaper has been changed before the restarting (see above).
When login has finished I started Update Manager and checked for updates. This error message appeared eve though apt-cache shows that the package is installed.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libvisual-0.4-plugins 0.4.0.dfsg.1-5
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
ApportVersion: 1.93-0ubuntu2
Architecture: amd64
Date: Sun Feb 26 08:43:32 2012
DuplicateSignature:
 Unpacking libgl1-mesa-dri:i386 (from .../libgl1-mesa-dri_8.0.1-0ubuntu2_i386.deb) ...
 Selecting previously unselected package libvisual-0.4-plugins:i386.
 dpkg: error processing /var/cache/apt/archives/libvisual-0.4-plugins_0.4.0.dfsg.1-5_i386.deb (--unpack):
  libvisual-0.4-plugins:i386 0.4.0.dfsg.1-5 (Multi-Arch: no) is not co-installable with libvisual-0.4-plugins:amd64 0.4.0.dfsg.1-5 (Multi-Arch: no) which is currently installed
ErrorMessage: libvisual-0.4-plugins:i386 0.4.0.dfsg.1-5 (Multi-Arch
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: libvisual-plugins
Title: package libvisual-0.4-plugins 0.4.0.dfsg.1-5 failed to install/upgrade: libvisual-0.4-plugins:i386 0.4.0.dfsg.1-5 (Multi-Arch
UpgradeStatus: Upgraded to precise on 2012-02-26 (0 days ago)

[Launchpad Janitor (janitor)]

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