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/source/Sources  404  Not Found



W: Failed to fetch http://ppa.launchpad.net/pcf/miro-releases/ubuntu/dists/quantal/main/binary-i386/Packages  404  Not Found



E: Some index files failed to download. They have been ignored, or old ones used instead.