I'll just upgrading Xfce 4.8 on a Debian Wheezy (7.1) to Xfce4.10 from the testing branch, the upgrade works well.
But, I see that the audio mixer plugin not show anymore the "Command" option, when I check the properties of this plugins.
The version of the audio mixer in Xfce4.8 show this option, below two combobox.
Why this "regression" in Xfce4.10 ? Only the two previous comboxbox are present in the properties. Now I can't set a custom command (ie. pavucontrol) that's start when I click on the icon in the systray ?