There is a shadowing conflict between 
 
  /usr/local/lib/xemacs/xemacs-packages/lisp/ecrypto/md5
 
 and
 
  /usr/local/lib/xemacs/xemacs-packages/lisp/gnus/md5 
You don't mention the versions you're using, but md5 was removed from
gnus as of 2002-09-17, and the first package version without it was
1.63.  Upgrade your packages and this should disappear.
-- 
\/ille Skyttä
ville.skytta at 
xemacs.org