Please describe the problem:
After upgrading to Intrepid, audio playback via Banshee 1.2.1 fails silently (no audio, icon appears next to track played). When run from a terminal, the following error is issued:

"[Error 18:13:39.734] GStreamer resource error: Settings"

The error appears to be unassociated with Banshee specifically, however, because playback also fails in Rhythmbox (though without triggering the same - or any, for that matter - warning.

Audio playback is only possible from VLC, which I believe does not use GStreamer as a backend.

Installed GStreamer version looks to be 0.10.

Have tried the fix recommended below [1]; this had no effect.

Steps to reproduce:
1. Open Banshee (or Rhythmbox, etc)
2. Play track from library


Actual results:
No sound produced, icon appears next to track, terminal returns error:
[Error 18:13:39.734] GStreamer resource error: Settings


Expected results:
Sound to be played

Does this happen every time?
Yes

Other information:
aplay and paplay both work on the same hardware, as does VLC. gstreamer-properties is currently set to PulseAudio Sound Server. Previously, it was set to ALSA. Neither allows Banshee or Rhythmbox to work.