Comment 13 for bug 92879

I am suffering from this bug as well. Exact same symptoms.

Note that recording *does* work using e.g. arecord on the command line (then aplay to listen).

This is indeed a high-profile bug, and I was sure my microphone was broken and/or Feisty's recording capabilities were broken, until I thought to try arecord (which I happened to have heard of sometime).