I have Sigmatel V6.10.5866.0, which would appear to be a newer version. And that wouldn't explain the USB card not working anyway. Edit: Tried to install that driver anyway. Get an error after unzipping.
My laptop has two built-in microphones and I have a USB sound card with two microphones built into it. Both recording devices show up in software but if I try to use either of them they output high pitched static for a few seconds and then go completely silent. The right channel always cuts out...