Looks clean to me. Synaptic says it can not download the index, but ‘apt-get update’ does? I wonder.
SynAPTic is just another tool, like APT-get. Both are frontends for the packagemanager dpkg.
Is there any third party repository in your /etc/apt/sources.list?
~ ❯❯❯ cat /etc/apt/sources.list.d/aaa-elive.list 1
### Note: don't change the name of this file, its needed in order to parse it by apt to be the first sources to consider, otherwise it can bug installing packages from debian as preference even if we have the PIN priority correctly set (example: scite)
# VERY IMPORTANT: if you want to add other repos to your system it is strictly needed that is a repo for wheezy
# otherwise you will end in an entirely broken by uncompatible dependencies system (use the elive installer with the upgrade-mode for an automated reparation & recovery)
deb http://repo.wheezy.elive.elivecd.org/ wheezy main elive efl games ports fixes drivers multimedia non-free
~ ❯❯❯ cat /etc/apt/sources.list.d/debian.list
deb http://repo.wheezy.debian.elivecd.org/debian wheezy main contrib non-free
deb http://repo.wheezy.deb-security.elivecd.org/debian-security wheezy/updates main contrib non-free
deb http://repo.wheezy.debian.elivecd.org/debian wheezy-backports main contrib non-free
~ ❯❯❯ cat /etc/apt/sources.list.d/ggg-marillat.list
# original marillat repo:
#deb http://www.deb-multimedia.org wheezy main non-free
# elive mirrored repo:
deb http://repo.wheezy.deb-multimedia.elivecd.org/ wheezy main non-free
these are the original.
To get any error while upgrading, please try in a console/terminal:
sudo apt-get dist-upgrade