question on gdkpixbuf output filter

["W. Borgert" <debacle debian org>]

Hi,

am I dumb?  How can I use the GdkPixbuf export filter?
According to plug-ins/pixbuf/pixbuf.c, the filter supports
"png, "jpg", "jpeg", the unique name is "gdkpixbuf".  I
tried:

dia --export-to-format=gdkpixbuf foo.dia
dia --export-to-format=jpeg foo.dia
dia --export-to-format=jpg foo.dia
dia --export-to-format=png foo.dia

For the first three variants, I get

** ERROR **: Can't find output format XXX

In the latter case, the PNG filter is used, not GdkPixbuf.
What's wrong?  Version: CVS of yesterday on Debian sid.

Cheers,
-- 
W. Borgert <debacle debian org>