encode avi/xvid4 with no audio

Hi again.

i'm trying to encode a title that is a bunch of production stills.
the title has no (0) audio tracks.   no matter what i do with the audio
options in the transcode tab i always get:

"WARNING: no target audio track #0"

the transcode supposedly finishes successfully.   however the target size is
23MB and the output avi is ~2MB.

trying to play the avi in mplayer gives:
"AVI file format detected.
[aviheader] Video stream found, -vid 0
AVI: Missing video stream!? Contact the author, it may be a bug :(
libavformat file format detected.
[avi @ 0x24fdd30]Could not find codec parameters (Video: mpeg4, 400x432)
LAVF_header: av_find_stream_info() failed
"

trying to use the multiple audio track button gives:
"An internal exception was thrown!
The error message was:

Illegal division by zero at
/usr/lib64/perl5/vendor_perl/5.8.8/Gtk2/Ex/FormFactory/CheckButtonGroup.pm
line 128.
"
i suppose the 0 it's trying to divide by is the number of audio tracks to
setup the GTK form.

the select track pulldown in the audio options is empty and does not drop
down (as expected since there is 0 audio tracks)

ideas?

thanks!
-eric

-- 
"The plural of anecdote is not fact."