nnmaildir fails to show new messages

[Vebjorn Ljosa]

The problem I am having is that gnus-group-get-new-news (g in the
group buffer) does not cause new nnmaildir messages to appear in the
summary buffer or to be included in the count in the group buffer.
The new messages show up, however, if I do a
gnus-group-get-new-news-this-group on the group.

gnus-group-get-new-news causes the new messages to be moved from the
"new" subdirectory of the maildir to the "cur" subdirectory---but I
can I make them show up in the summary and group buffers?

I'm using Gnus 5.11, and my .gnus.el is as follows:

(setq gnus-select-method '(nnmaildir "" (directory "~/.nnmaildir/"
                                         target-prefix "../maildirs/"))
      gnus-message-archive-method "nnmaildir"
      gnus-message-archive-group "Sent"
      sendmail-program "/opt/local/bin/msmtp"
      gnus-secondary-select-methods '((nntp "news.mit.edu")))

(setq gnus-summary-line-format "%U%R%z%(%d %-23,23f%) %B%s\n"
      gnus-thread-sort-functions '(gnus-thread-sort-by-number
                                   gnus-thread-sort-by-date))

Thanks,
Vebjorn