Gnus: Gcc and imap folders

[Arash Esbati]

Hi all,

I can't get Gcc and threading work reliably in imap folders.  Here an
example: Incoming mail is shown without parent.

When I hit `A r', the parent is shown and I get threading:

One thing occured to me is that pretty printing of char numbers is
broken (n/a) -- it looks fine for the same message in my sent-mail
archive (I Gcc all mails into nnml+archive:sent-mail, see below).  I
regenerated nnml+archive and .overview file seems also ok.

Any hint how I can get my hands on this issue?

Some relevant parts of my .gnus are:

;; Archiving
(setq gnus-message-archive-method
      '(nnml "archive"
             (nnml-directory   "~/Mail/archive")
             (nnml-active-file "~/Mail/archive/active")
             (nnml-get-new-mail nil)
             (nnml-inhibit-expiry t)))

(setq gnus-message-archive-group
      '((if (message-news-p)
            "sent-news"
          "sent-mail")))

;; Finding the Parent
(setq gnus-refer-article-method
      '(current
        (nnml "archive")))

;; Group parameters
(setq gnus-parameters
      '(("^nnimap\\+gmail:.*"
         (gnus-show-threads t)
         (gnus-thread-sort-functions
          '(gnus-thread-sort-by-number
            gnus-thread-sort-by-subject
            (not gnus-thread-sort-by-date)))
         (gnus-use-scoring nil)
         (display . all)
         (gnus-summary-line-format
          "%U%R%z%B%(%4k: %-20,20f%) %d %3{%s%}\n"))))

TIA, Arash