Comment 7 for bug 285621

after following the steps in http://ubuntuforums.org/showthread.php?t=866965 and selecting Pulse Audio as my capture source, I have no more problems.

specifically, I did the following to fix this issue:

1. installed: padevchooser libao-pulse libsdl1.2debian-pulseaudio
2. changed /etc/libao.conf to: default_driver=pulse

as far as I can tell, padevchooser is just a utility and may not be required for the solution to work.