176: Why is the GNUS-generated `Date:' header invalid?
  
  GNUS generates `Date:' headers without time zones.  C-News's `inews'
  doesn't replace it with a valid header, but will generate it if not
  already there.  If it is invalid, the article will not be forwarded
  properly.  Quick fix:
  
    (defun gnus-inews-date () nil)
  
  I think this is fixed in GNUS 3.14.1.