Wrong volume key in rc.xml

1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu
Description: Ubuntu precise (development branch)
Release: 12.04

2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center
lubuntu-default-settings:
  Instalados: 0.23
  Candidato: 0.23
  Tabla de versión:
 *** 0.23 0
        500 http://archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages
        100 /var/lib/dpkg/status

3) What you expected to happen
Lowering and muting sound should work fine.

4) What happened instead
Mute key doesn't work, and lower volume key works erratically.

This is happening because in rc.xml, XF86AudioLowerVolume appears twice, and is bound to both "amixer -q sset Master 3%+" and "amixer -q sset Master toggle".

XF86AudioMute should be bound to the latter command instead.

Besides, I think raising the volume should unmute sound, as that's what happens in most gadgets/OSes. So, XF86AudioRaiseVolume should execute "amixer -q sset Master 3%+ unmute", instead of "amixer -q sset Master 3%+".

I attach diff output between current rc.xml and a fixed one. Sorry if I missed something, this is my first report.