While trying to get "Play it slowly" back to work, I need to install Gconfaudiosink, contained in the gst-plugins package.
guest@guest:~$ sudo apt-get install gst-plugins [sudo] password for guest: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package gst-plugins
(same output for gst-plugins-base and gst-plugins-good)
Can you help me installing this plugins?