dio@dio-ubuntu:~$ apt-cache policy nautilus
nautilus:
  Installiert:           1:3.8.1-0ubuntu1~raring1
  Installationskandidat: 1:3.8.1-0ubuntu1~raring1
  Versionstabelle:
 *** 1:3.8.1-0ubuntu1~raring1 0
        500 http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu/ raring/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.6.3-0ubuntu16 0
        500 http://archive.ubuntu.com/ubuntu/ raring/main amd64 Packages