How do you Install the Latest Release of Miro?

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http://askubuntu.com – In the software centre the latest release of Miro available is 4.0.4 whereas the latest release of Miro is 5.0.4. How do I download 5.0.4 on 12.10? I have tried following the guide at http://www.getmiro.com/download/for-ubuntu/ (and thus have already run sudo add-apt-repository ppa:pcf/miro-releases) but it failed and when I tried to run sudo apt-get update I received the error: W: Failed to fetch http://ppa.launchpad.net/pcf/miro-releases/ubuntu/dists/quantal/main/sou... 404 Not Found W: Failed to fetch http://ppa.launchpad.net/pcf/miro-releases/ubuntu/dists/quantal/main/binar (HowTos)