Comment 5 for bug 1347964

And this:

lance@lance-desktop:~$ sudo apt-get dist-upgrade -s
[sudo] password for lance:
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 ubuntu-desktop : Depends: checkbox-gui but it is not installed
                  Depends: ubuntu-session but it is not installed
                  Depends: unity-control-center but it is not installed
                  Depends: unity-settings-daemon but it is not installed
                  Recommends: cheese but it is not installed
                  Recommends: empathy but it is not installed
                  Recommends: totem but it is not installed
                  Recommends: totem-mozilla but it is not installed
                  Recommends: unity-webapps-common but it is not installed
                  Recommends: xul-ext-unity but it is not installed
                  Recommends: xul-ext-webaccounts but it is not installed
E: Unmet dependencies. Try using -f.