Look at this summary buffer snippet:

/----
| @  07-Oct,1.4k: Jesper Harder   | Re: trying to figure out \201þÿ
| @  07-Oct,1.5k: Fredrik Staxeng | þÿ%p%
| @  07-Oct,1.8k: Patrick Drechsl |   þÿ%%n 
| @  07-Oct,1.4k: Fredrik Staxeng |   þÿ%%p%
| @  07-Oct,1.8k: Patrick Drechsl |   þÿ%  þÿ%p%
| @  07-Oct,2.0k: Fredrik Staxeng |   þÿ%    þÿ%p%
| @  07-Oct,2.2k: Patrick Drechsl |   þÿ%      þÿ%%n 
| @  07-Oct,2.3k: Jonas Steverud  |   þÿ%      þÿ%p%
| @  08-Oct,1.4k: Jesper Harder   |   þÿ%p%
| @  08-Oct,1.2k: Jesper Harder   | Re: Routing problem
| @  08-Oct,2.5k: Jeppe N. Madsen | Re: Starting shell scripts when fetching news/mail?
| @  08-Oct,1.3k: Benjamin Rutt   | Re: save email copy in current folder?
| @  08-Oct,1.7k: Reiner Steib    | þÿ%p%
| @  08-Oct,1.5k: Clemens Fischer | Re: oort and x-faces
| @  08-Oct,2.6k: Reiner Steib    | þÿ%%n 
| @  08-Oct,1.4k: Clemens Fischer | þÿ%p%
| @  08-Oct,1.8k: Simon Josefsson | Re: Cannot IMAP with SSL
| @  08-Oct,1.2k: Paul Jarc       | Re: gnus-read-active-file 'some doesn't work
| @  09-Oct,1.8k: Uri Guttman     | þÿ%p%
| R  09-Oct,0.9k: Ed              | need (load-library "smtpmail") or not in .gnus?
| R  09-Oct,1.4k: Jesper Harder   | þÿ%p%
|    09-Oct,1.2k: Francis Litteri | Can I delete my "agent" directory if gnus-agent is set to nil?
|    09-Oct,1.3k: Jesper Harder   | þÿ%p%
|    09-Oct,2.5k: Micha Wiedenman | Re: another E-Mail Address
|    10-Oct,2.1k: Lam             | problem with mail
|    09-Oct,0.9k: Ed              | can someone post examples of nnmail-split-fancy?
|    10-Oct,1.1k: Alex Schroeder  | þÿ%%n 
|    09-Oct,1.3k: Glyn Millington | þÿ%p%
| @  10-Oct,1.1k: Clemens Fischer |   þÿ%p%
\----

I've hit `g' on the first article, Gnus changes the @ mark into a %
mark and tells me the article has been marked for downloading.  I hit
`g' on the first two space-marked articles, and they seem to have
been downloaded already -- I could read them normally and Gnus marked
them with R.

Why are some articles downloaded and other articles are not
downloaded?

I started my laptop this morning and hit `J s' to fetch all
articles.  I have two agent categories, one `imap' category contains
all the nnimap group and the `default' category is for the others.
Both categories have a predicate of `true'.

I think Simon told me before that the agent only downloads real fresh
articles, so that reading an article and then hitting M-u while
online might prevent downloading of that article.  But I'm quite sure
I didn't look at all those @ marked articles before!

Hm.  I did also add gnus-agent-fetch-selected-article to
gnus-select-article-hook.  But this only takes effect when I read a
message...

Any ideas?

kai
-- 
~/.signature is: umop ap!sdn    (Frank Nobis)