Comment 35 for bug 871133

I decided to take some initiative and apply the patch myself. Naturally, it needed to be applied to both gnome-settings-daemon and unity-settings-daemon. The new setting is exposed at "org.gnome.settings-daemon.plugins.sound.volume-step" and can easily be changed with dconf.

I've uploaded the packages to ppa:george-edison55/gnome-settings-daemon

More information about my fix (and instructions) can be found here: http://askubuntu.com/a/704733/5