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:
 libreoffice : Depends: libreoffice-core (= 1:3.6.0~rc4-0ubuntu3~ppa1~precise1) but it is not going to be installed
               Depends: libreoffice-writer but it is not going to be installed
               Depends: libreoffice-calc but it is not going to be installed
               Depends: libreoffice-impress but it is not going to be installed
               Depends: libreoffice-draw but it is not going to be installed
               Depends: libreoffice-math but it is not going to be installed
               Depends: libreoffice-base but it is not going to be installed
               Depends: ttf-dejavu but it is not going to be installed
               Depends: ttf-sil-gentium-basic
               Depends: libreoffice-filter-mobiledev but it is not going to be installed
               Depends: libreoffice-java-common (>= 1:3.6.0~rc4~) but it is not going to be installed
               Recommends: ttf-liberation or
                           ttf-mscorefonts-installer but it is not going to be installed
               Recommends: libpaper-utils but it is not going to be installed
               Recommends: libreoffice-gnome but it is not going to be installed or
                           libreoffice-kde but it is not going to be installed
 perl : Depends: perl-base (= 5.14.2-6ubuntu2.1) but 5.14.2-6ubuntu2.2 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).