Installing/Upgrading Scribus on Ubuntu

Ref.: http://wiki.scribus.net/index.php/Getting_Scribus_on_Ubuntu/Kubuntu_up_and_running

Add these to /etc/apt/sources.list:

#Scribus - Primary repository
deb http://debian.scribus.net/debian feisty main restricted
deb-src http://debian.scribus.net/debian feisty main restricted
#Scribus - Backup repository
deb http://debian.tagancha.org/debian feisty main restricted
deb-src http://debian.tagancha.org/debian feisty main restricted

then add the gpg-keys for these repositories,
sudo gpg --keyserver subkeys.pgp.net --recv-keys EEF818CF
sudo gpg --armor --export EEF818CF | sudo apt-key add -

then,
sudo apt-get update
(might have to do this twice)

then,
sudo apt-get upgrade
This should show scribus as the package (or as one of the packages) to be upgraded. Proceed with upgrading.

Install icc-profiles also:
sudo apt-get install icc-profiles