New posted unread articles Marked as read automatically.

[Shigeki Uno <shigeki@mediawars.ne.jp>]

Hello.
I've been subscribing several news groups and they're as follows:

  fj.editor.emacs               |   gnu.emacs.gnus   
  fj.editor.xemacs              |   gnu.emacs.sources
* fj.os.linux                   |   gnu.emacs.announce
  fj.os.bsd.netbsd              | * gnu.emacs.bug
  fj.news.reader.gnus           |
* fj.fleamarket.comp            |
  fj.sources                    |
  fj.rec.sports.prowrestling    |
  ------------------------------+------------------------
  japan.sports.prowrestling
  japan.sports.baseball.giants
  japan.tv.midnight
  japan.tv.channel.news
  japan.handmade.comp

( * <-- problem news groups)
  
Some of them(* mark) _never show up_ in groups buffer even when new
articles are posted by someone. At first I didn't know what's going on
and had been thought that no articles were posted. But I happened to
check old news articles typing "C-u space" and found that articles
were _posted_. :-( they were _marked as read automatically_ regardless
of existence of unread articles, so I couldn't read new ones. This
happens every day and on cvs-5.8.5/5.8.6/5.8.7.

Is this a bug ? Or am I wrong ?

As you can see, I'm now running Gnus 5.8.7 cvs as of May 4th on emacs
20.6 now.

Any thought?

Thanks.
---
Shigeki Uno