ubuntu@ubuntu:~$ sudo apt-get install ubuntu-tweak
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
ubuntu-tweak : Depends: python-compizconfig but it is not installable
E: Unable to correct problems, you have held broken packages.
Rekao sam ti da ćeš nešto potrgati. Nema veze da se to popraviti. Odi lijepo u terminal i otkucaj sudo synaptic, u prozoru koji ti se otvori odi na karticu Edit (ili Uredi) i odaberi fix bocken packages. to bi trebalo riješiti slomljene pakete.
EDIT: Pogledaj malo ovdje.