I have reported a duplicate of this bug. Although I am not the reporter of this bug, I thought my /var/log/apt/term.log may help you.
** Attachment added: "term.log" https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/1024861/+attachment/3255628/+files/term.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1024861 Title: package language-pack-en 1:12.04+20120618 failed to install/upgrade: package language-pack-en is already installed and configured To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/1024861/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs