Front/Rear Speakers Reversed (Windows)?

I just added sound to my learning project. Things went fine, except for testing on my Windows box. It sounds like the front/rear channels are reversed. I can barely hear the sounds out of my front speakers; the rear channels basically play the sound at full volume.

This is on a 4.1 setup. My main and only camera is the audio listener. I've tried playing sounds both through AudioSources and through AudioSource.PlayClipAtPoint(), but both behave the same. If I change my speaker settings back to stereo everything sounds fine.

I had a friend with a Windows/surround setup check it, too, and he had the same problems.

Here's the project:

http://www.flashbangstudios.com/tests/unityihc1/IHC.html

Standalone Win32 download:

http://www.flashbangstudios.com/tests/IHCTest1.zip

(I had faint crackling on the MacBook with doppler turned out, too, so I sent in a bug report so you guys have my system specs.)