Agent and IMAP server not in sync

["Jørn Helge B. Dahl" <jornd@users.sourceforge.net>]

I have all my e-mails on an IMAP server, I think it's a UW-something.  I
use the agent to keep my laptop synced with it, since I cannot access
the IMAP-server from home.  I have around 30 groups on that server, with
anything from 2-3 to 1000 e-mails in them.

Once in a while I need to access some old email, so I do not want the
agent to expire any e-mails at all, but keep the server and laptop
_completely_ synced.

That has, more or less, been the case for a couple of months.  I say
more or less, because there has been some slight differences, mostly due
to the agent not fetching too big messages, I think.

But today I wanted to finetune the agent details, so I added all the
groups to the default category, set the category predicate to `true'
instead of `short', and some other small things.

Then I used the gnus-agent-expire command.  I did it because of some
e-mails still being in the agent while deleted on the server, so I
(might have :-)) thought that that would take care of it.

Anyway, that deleted (of course) all e-mails in the agent older than one
week.

So, naturally I wanted to import all old e-mail into the agent again.
The strange thing is, I cannot access _any_ of the old e-mails anytime.
When I C-u <RET> on one of the groups and enters, expecting to find all
750 (or so) e-mails, I only find one week worth of e-mail.  Pluggedness
or non-pluggedness, all the same.

The only way to actually see those messages is to remove the agent on
the server and enter the group.  But then again, I won't be able to load
it into the agent, do I? :-)

I have otherwise taken all measures to keep the e-mails in the
agent-cache.  Relevant portion of .gnus-el:

;;;; Agent
(setq agent-disable-undownloaded-faces t)
(setq gnus-agent-consider-all-articles t)
(setq gnus-agent-synchronize-flags t)
(setq gnus-agent-cache t)
(add-hook 'gnus-select-article-hook 'gnus-agent-fetch-selected-article)
;; (setq gnus-agent-handle-level 3)

-- 
Jørn Helge B. Dahl