having trouble suppressing inline images

I'm having trouble suppressing attachments. For example, I'd
like all jpeg images to be discarded. My best efforts with
MIMEFilters,  m2h_null::filter, MIMEArgs, excludeexts are
insufficient. I've placed everything needed to reproduce the
problem here. Thoughts greatly appreciated.

  http://www.mail-archive.com/contrib/debug/

Cheers,
Jeff