Comment # 8 on bug 944759 from Takashi Iwai

(In reply to Franck Bui from comment #7)
> how is exactly "Pulseaudio Audio Sink" output plugin and
> gstreamer-0_10-plugins-good related ?

gstreamer is the backend, and PA support is included in that plugin.

> And no installing gstreamer-0_10-plugins-good doesn't help.

Are you 100% sure?  Double check.  Or, you might be missing
gstreamer-plugins-good?