package timidity-daemon 2.13.2-40build2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Spinaker]

groups: timidity: utilisateur inexistant
adduser: L'utilisateur timidity n'existe pas.
dpkg: error processing timidity-daemon (--configure):
 subprocess installed post-installation script returned error exit status 1
Setting up vorbisgain (0.36-3.1ubuntu2) ...
Setting up wavpack (4.60.1-2) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Errors were encountered while processing:
 timidity-daemon
Error in function:
Setting up timidity-daemon (2.13.2-40build2) ...
Adding group timidity....done
Adding system user timidity....done
groups: timidity: utilisateur inexistant
adduser: L'utilisateur timidity n'existe pas.
dpkg: error processing timidity-daemon (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:

When i want too instal soundkonverter

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: timidity-daemon 2.13.2-40build2
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.93-0ubuntu2
Architecture: amd64
Date: Thu Mar 1 13:51:04 2012
DpkgHistoryLog:
 Start-Date: 2012-03-01 13:50:29
 Commandline: aptdaemon role='role-commit-packages' sender=':1.118'
 Install: wavpack:amd64 (4.60.1-2, automatic), soundkonverter:amd64 (0.9.94-2), cdparanoia:amd64 (3.10.2+debian-10ubuntu1, automatic), mppenc:amd64 (1.16-1, automatic), libkcddb4:amd64 (4.8.0-0ubuntu1, automatic), mp3gain:amd64 (1.5.2-r2-2, automatic), vorbisgain:amd64 (0.36-3.1ubuntu2, automatic), speex:amd64 (1.2~rc1-3ubuntu2, automatic), faad:amd64 (2.7-7, automatic), icedax:amd64 (1.1.11-2ubuntu2, automatic), flac:amd64 (1.2.1-6, automatic), timidity-daemon:amd64 (2.13.2-40build2, automatic), kdemultimedia-kio-plugins:amd64 (4.8.0-0ubuntu1, automatic), timidity:amd64 (2.13.2-40build2, automatic)
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
PackageArchitecture: all
SourcePackage: timidity
Title: package timidity-daemon 2.13.2-40build2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2012-02-19 (11 days ago)

[Launchpad Janitor (janitor)]

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