Edita /etc/apt/sorces.list e sostitiscilo con questo come sta e giace senza commentare o decommentare nulla.

# List of available apt repositories available from ayo.freshrpms.net.
# This file should contain an uncommented default suitable for your system.

# See http://ayo.freshrpms.net/ for a list of other repositories and mirrors.

# $Id: sources.list.i386 720 2004-05-19 18:24:16Z dude $

# Fedora Linux 3
rpm http://ayo.freshrpms.net/ fedora/linux/3/i386 core updates freshrpms
rpm http://ayo.freshrpms.net/ fedora/linux/3/i386 tupdates
rpm-src http://ayo.freshrpms.net/ fedora/linux/3/i386 core updates freshrpms
rpm-src http://ayo.freshrpms.net/ fedora/linux/3/i386 tupdates

# Fedora Linux 2
# rpm http://ayo.freshrpms.net/ fedora/linux/2/i386 core updates freshrpms
# rpm http://ayo.freshrpms.net/ fedora/linux/2/i386 tupdates
# rpm-src http://ayo.freshrpms.net/ fedora/linux/2/i386 core updates freshrpms
# rpm-src http://ayo.freshrpms.net/ fedora/linux/2/i386 tupdates

# Fedora Linux 1
# rpm http://ayo.freshrpms.net/ fedora/linux/1/i386 core updates freshrpms
# rpm http://ayo.freshrpms.net/ fedora/linux/1/i386 tupdates
# rpm-src http://ayo.freshrpms.net/ fedora/linux/1/i386 core updates freshrpms
# rpm-src http://ayo.freshrpms.net/ fedora/linux/1/i386 tupdates

# Fedora Linux Development
rpm http://ayo.freshrpms.net/ fedora/linux/development/i386 core
# rpm http://ayo.freshrpms.net/ fedora/linux/1/i386 freshrpms
# rpm-src http://ayo.freshrpms.net/ fedora/linux/development/i386 core
# rpm-src http://ayo.freshrpms.net/ fedora/linux/1/i386 freshrpms

# Red Hat Linux 9
# rpm http://ayo.freshrpms.net/ redhat/9/i386 os updates freshrpms
# rpm-src http://ayo.freshrpms.net/ redhat/9/i386 os updates freshrpms

# Red Hat Linux 8.0
# rpm http://ayo.freshrpms.net/ redhat/8.0/i386 os updates freshrpms
# rpm-src http://ayo.freshrpms.net/ redhat/8.0/i386 os updates freshrpms

# Red Hat Linux 7.3
# rpm http://ayo.freshrpms.net/ redhat/7.3/i386 os updates freshrpms
# rpm-src http://ayo.freshrpms.net/ redhat/7.3/i386 os updates freshrpms

# Red Hat Linux 7.2
# rpm http://ayo.freshrpms.net/ redhat/7.2/i386 os updates freshrpms
# rpm-src http://ayo.freshrpms.net/ redhat/7.2/i386 os updates freshrpms

# Red Hat Linux 7.1
# rpm http://ayo.freshrpms.net/ redhat/7.1/i386 os updates freshrpms
# rpm http://ayo.freshrpms.net/ redhat/7.1/i386 powertools dma
# rpm-src http://ayo.freshrpms.net/ redhat/7.1/i386 os updates freshrpms
# rpm-src http://ayo.freshrpms.net/ redhat/7.1/i386 powertools dma

# Red Hat Linux 7.0
# rpm http://ayo.freshrpms.net/ redhat/7.0/i386 os updates freshrpms
# rpm http://ayo.freshrpms.net/ redhat/7.0/i386 powertools dma
# rpm-src http://ayo.freshrpms.net/ redhat/7.0/i386 os updates freshrpms
# rpm-src http://ayo.freshrpms.net/ redhat/7.0/i386 powertools dma

# Red Hat Linux 6.2
# rpm http://ayo.freshrpms.net/ redhat/6.2/i386 os updates freshrpms
# rpm http://ayo.freshrpms.net/ redhat/6.2/i386 powertools
# rpm-src http://ayo.freshrpms.net/ redhat/6.2/i386 os updates freshrpms
# rpm-src http://ayo.freshrpms.net/ redhat/6.2/i386 powertools


Poi da console dai apt-get update
apt-get upgrade - 2 orette di S.Pazienza e rimetti tutto a posto , aggiornandoti il SO da FC3 a FC4Devel - con Gnome-2.8.2 kde3.3.2 - Gimp-2.2.0.4