Thanks for your bug, that's known and already fixed upstream:
http://bugzilla.gnome.org/show_bug.cgi?id=399807
** Changed in: gnome-media (Ubuntu)
Importance: Undecided => Low
Assignee: (unassigned) => Ubuntu Desktop Bugs
Status: Unconfirmed => Fix Committed
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gstreamer-properties warning
https://launchpad.net/bugs/80737