This morning, I installed Xubuntu 13.10 with the daily build image:
When everything finished, the sound indicator in the XFCE panel is empty, I mean...nothing there. No sound settings, no volumn bar.
I searched on the launchpad and found that It is a bug:
So, here how to fix this:
1. Open the /usr/share/dbus-1/services/indicator-sound.service file:
$ sudo nano /usr/share/dbus-1/services/indicator-sound.service
2. Change the exec line to the following: