Yes, this looks like stale repository: trying to install nova-vncproxy 2012.2~f3-0ubuntu1~cloud0 while the world has moved on.
** Project changed: nova => nova (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to nova in Ubuntu. https://bugs.launchpad.net/bugs/1096698 Title: nova-vncproxy depends on missing version of nova-common To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nova/+bug/1096698/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs