This does seem tio be a Zen issue the past two months or so, as I get headers from Easynews in the main, and when I tried getting header sfrom both, I still get that response to every file in certain posts - they are all fine on Easynews, no need for pars, recent examples the past day or so are,
in group alt.binaries.tv
#a.b.mm@efnet - req 45594 - Smallville.S07E12.720p.HDTV.x264-CTU - [41/43] - "ctu-x264-smallville.712.rar" yEnc
#a.b.mm@efnet - req 45602 - Supernatural.S03E11.720p.HDTV.x264-CTU - [41/43] - "ctu-x264-supernatural.311.rar" yEnc
#A.B.MM@EFNet Presents: REQ 45202 - Stargate.Atlantis.S04E15.iNTERNAL.720p.HDTV.x264-SFM - 06/33 - stargate.atlantis.s04e15.720p.hdtv.x264-sfm.part05.rar
I use newsbin so I do not know how to get the articel numbers, but EVERY post of x264 45MB files, roughly 20+ of, for each of these posts the past 1-2 months gives 'failed to retrieve article from Zen. The first part or each file may be there, as the par2, nfo, etc come down fine, but every other part is never on Zen.
Zen news service is either missing EVERY articel of this ilk, in terms that you cannot grab it from Zens news serveice, or Zen miss-interprets header info that other proper news providers handle correctly. It never used to be like this, something major is very wrong.