can't display videos from youtube, redtube etc.

if you are running regular ubuntu, try this:
sudo apt-get install ubuntu-restricted-extras

daniel, i dont see how that would help.

not really a bug. converting to question.

Open a Terminal from the menu Applications → Accessories → Terminal and type:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

sudo apt-get install flashplugin-nonfree

sudo apt-get clean all

give your user password when requested, you don't see nothing when you type it, then press enter.

Hope this helps

Play mp3 and dvd under Ubuntu

First please install https://help.ubuntu.com/community/RestrictedFormats

You need to have extra repositories enabled..

Please first enable the multiverse repository:

Open System → Administration → Software sources → [ Tab Ubuntu software ]
enable "Software restrictecd by copyright or legal issue ( multiverse )"
Close and confirm the repository reload.

Type the following command in a terminal (applications → accessories → terminal)

sudo aptitude install vlc

To get better dvd playback first you need to add the medibuntu http://www.medibuntu.org/ repository to your /etc/apt/sources.list file:
here howto add https://help.ubuntu.com/community/Medibuntu here the medibuntu available software list http://packages.medibuntu.org/

Then to install:

sudo update
sudo aptitude install libdvdread3 libdvdnav4 libdvdcss2

give your user password when requested, you don't see nothing when you type it, then press enter.

Hope this helps