After repeated testing of PulseAudio builds leading up to PulseAudio 3.0, I determined that this commit introduced this bug/incompatibility: 7fad67c46188991c04a42b190349ebb3f4a1756f 2012-05-15 17:06:53 (GMT) http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=7fad67c46188991c04a42b190349ebb3f4a1756f