GStreamer General Resource Error
Rhythmbox seemed unhappy with some of my incoming podcasts, quietly refusing to import them with the note: GStreamer encountered a general resource error.
This Ubuntu forum thread suggested removing the
gstreamer0.10-fluendo-mp3 package in favor of letting
gstreamer0.10-plugins-bad, or in my case
gstreamer0.10-plugins-really-bad from debian-multimedia.org.
Now those files import just fine. Among the regular offenders were TalkCrunch, Drunk and Retired, and RedMonk Radio.