J'ai changé dans le tutorial, les lignes pour installer les décodeurs et les applications supplémentaires (par exemple, flash) par l'installation de EasyUbuntu, qui fait la même chose mais en plus rapidement. C'est compatible Dapper évidemment. :-)

@ Cédric : Si t'as le temps, faudrait changer le http://web.fede-ulg.org/sources.list pour qu'il soit compatible Dapper. Si cela t'aide, voici le mien :

[code:1:0a03c369d6]
martin@giscow&#58;~$ cat /etc/apt/sources.list
deb http&#58;//archive.ubuntu.com/ubuntu/ dapper main restricted
deb-src http&#58;//archive.ubuntu.com/ubuntu/ dapper main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http&#58;//archive.ubuntu.com/ubuntu/ dapper-updates main restricted
deb-src http&#58;//archive.ubuntu.com/ubuntu/ dapper-updates main restricted

## Uncomment the following two lines to add software from the 'universe'
## repository.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb http&#58;//archive.ubuntu.com/ubuntu/ dapper universe multiverse
deb-src http&#58;//archive.ubuntu.com/ubuntu/ dapper universe multiverse

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http&#58;//archive.ubuntu.com/ubuntu/ dapper-backports main restricted universe multiverse
deb-src http&#58;//archive.ubuntu.com/ubuntu/ dapper-backports main restricted unive rse multiverse

deb http&#58;//security.ubuntu.com/ubuntu dapper-security main restricted
deb-src http&#58;//security.ubuntu.com/ubuntu dapper-security main restricted
deb http&#58;//security.ubuntu.com/ubuntu dapper-security universe multiverse
deb-src http&#58;//security.ubuntu.com/ubuntu dapper-security universe multiverse

## Cipherfunk multimedia packages &#40;GPG key&#58; 33BAC1B3&#41;
## uncomment this one for multimedia packages AFTER having finished the upgrade to Dapper.
deb ftp&#58;//cipherfunk.org/pub/packages/ubuntu/ dapper main

## Dapper PLF
## only uncomment it if you need it
deb http&#58;//packages.freecontrib.org/ubuntu/plf/ dapper free non-free
deb-src http&#58;//packages.freecontrib.org/ubuntu/plf/ dapper free non-free

## Bleeding edge &#40;official&#41; wine repository for Dapper
## only uncomment it if you need it
deb http&#58;//wine.budgetdedicated.com/apt dapper main
deb-src http&#58;//wine.budgetdedicated.com/apt dapper main

## Skype
## only uncomment it if you need it
## deb http&#58;//download.skype.com/linux/repos/debian/ stable non-free

## QuinnStorm's repos for Compiz and Xgl ##
deb http&#58;//www.beerorkid.com/compiz/ dapper main
deb-src http&#58;//www.beerorkid.com/compiz/ dapper main
deb http&#58;//xgl.compiz.info/ dapper main
deb-src http&#58;//xgl.compiz.info/ dapper mainin

## Listen
deb http&#58;//theli.free.fr/packages/dapper/ ./

## Spécifiques à KDE
# KDE &#40;ce dépôt fournit la dernière version de KDE&#41;
deb http&#58;//kubuntu.org/packages/kde-latest dapper main

# KOffice &#40;ce dépôt fournit la dernière version de KOffice&#41;
deb http&#58;//kubuntu.org/packages/koffice-latest/ dapper main

# Amarok &#40;ce dépôt fournit la dernière version de Amarok&#41;
deb http&#58;//kubuntu.org/packages/amarok-latest dapper main
[/code:1:0a03c369d6]

(tu peux déja supprimer les dépots [url=http://flickr.com/photos/tintamarre/160252506/]XGL/Compiz[/url], ...)