Adobe Media Encoder CS5 - No audio

I have had a unique problem recently where my Adobe Media Encoder (CS4 and CS5) would not encode the audio on a movie.  There were no error messages - there was just no sound.  Examining the resulting FLV file in Audacity showed that there was an audio track with a waveform, however Adobe Media Player and VLC Player would not play the audio.

After much trial and error, I was able to identify the following fix:

1. Make sure that the video you want to render as an FLV is located on your hard drive.
2. From the Start menu select Run.
3. In the Open field, type "msconfig" then click OK.
4. From the General tab, select "Diagnostic Startup" then click the "OK" button.
5. At the prompt, select "Restart".
6. Once your PC has restarted, run AME and encode the video you saved on your hard drive.
7. Repeat steps 1-5, except select "Normal Startup" instead of "Diagnostic Startup".

Your Adobe Media Encoder should now work correctly.

As far as I can tell, this fix seems to work when using a PC where your Windows profile is stored on a network share.