software center - how to repair ubuntu package catalog?

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:
 totem-plugins : Depends: libgnomeui-0 (>= 2.17.1) but it is not going to be installed
                 Depends: libtrackerclient0 (>= 0.6.6) but it is not installable
                 Depends: python-gdata but it is not going to be installed
                 Depends: totem-gstreamer (= 2.22.1-0ubuntu3.8.04.6) but it is not installable or
                          totem-xine (= 2.22.1-0ubuntu3.8.04.6) but it is not installable
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).