Need a little assistance with transcoding a file - audio issue

Hi folks.

I'm having a little difficulty trying to figure out how to handle the 
audio in some video files I recorded with my Fuji E900 digital camera.
Using transcode 1.1.5 on x86_64.

tcprobe reports this about the input file:

[tcprobe] RIFF data, AVI video
[tcprobe] summary for ./DSCF3047.AVI, (*) = not default, 0 = not detected
import frame size: -g 640x480 [720x576] (*)
     aspect ratio: 4:3 (*)
       frame rate: -f 30.000 [25.000] frc=5 (*)
      audio track: -a 0 [0] -e 16000,8,1 [48000,16,2] -n 0x1 [0x2000] (*)
                   bitrate=128 kbps
           length: 1530 frames, frame_time=33 msec, duration=0:00:50.999


I attempt to transcode it to an xvid4 file, with the audio simply copied:

transcode --accel sse2 -i DSCF3047.AVI -y xvid4,tcaud -N 0x1 -o 
/dev/null --threads 2 -R 1
transcode --accel sse2 -i DSCF3047.AVI -y xvid4,tcaud -N 0x1 -o 
./newfile.avi --threads 2 -R 2

It transcodes and everything seems fine and dandy, but the audio in the 
resulting is out of sync.  It ends halfway through the video playback.  
tcprobe on the resulting file shows:

[tcprobe] RIFF data, AVI video
[tcprobe] summary for ./newfile.avi (*) = not default, 0 = not detected
import frame size: -g 640x480 [720x576] (*)
     aspect ratio: 4:3 (*)
       frame rate: -f 30.000 [25.000] frc=5 (*)
      audio track: -a 0 [0] -e 16000,8,1 [48000,16,2] -n 0x1 [0x2000] (*)
                   bitrate=256 kbps
           length: 1530 frames, frame_time=33 msec, duration=0:00:51.000

The audio bitrate shows as 256 kbps instead of 128 kbps for the original 
file.  If I re-attempt to transcode with -b 128 as an added parameter, I 
*still* end up with the resulting file coming up as 256 kbps. audio.  Am 
I doing something wrong here?

Thanks folks.

-Mishehu