Comment 3 for bug 1055892

It is a feature that is advertised but not apparently functional in the current Ubuntu version. So "feature that has never previously worked" is the best of those three. It may be that there are changes in more recent versions (post 1.2.2) that are necessary to make it work as well. Debian/experimental has a package for 1.2.6, at least (which I haven't tried yet): http://packages.debian.org/experimental/keepalived