[VM] Window raise... again...

[Johan Vromans]

What's keeping me from upgrading from 8.1.1. to 8.1.2 is that in the
latter version fetching new messages cause the VM subject window to
raise itself, disturbing whatever I'm doing at that moment.

I'll explain. I have a single-window setup. The VM buffers are shown in
the main Emacs window. My INBOX is a virtual folder consisting of
~/INBOX and several ~/Mail/INBOX.2012xx (one for each month).

I have a VM subject buffer but I'm working in another buffer. A new mail
arrives in my mail spool. At a timer event, VM picks up this mail and
appends it to the INBOX.

With 8.1.1, a message shows in the minibuffer "Got mail from ...".

With 8.1.2, the VM summary buffer is raised to the foreground.

In case it is helpful, this is what is shown in the *Messages* buffer:

VM 8.1.1:

  Added to /home/jv/INBOX
  Got mail from /var/spool/mail/jv.

VM 8.2.2:

  Added to /home/jv/INBOX
  Got mail from /var/spool/mail/jv.
  366 messages, 0 new, 1 unread, 0 deleted [2 times]
  Checking for new mail for /home/jv/Mail/INBOX.201203...
  366 messages, 0 new, 1 unread, 0 deleted
  407 messages, 0 new, 0 unread, 0 deleted [2 times]
  Checking for new mail for /home/jv/Mail/INBOX.201204...
  407 messages, 0 new, 0 unread, 0 deleted
  327 messages, 0 new, 0 unread, 0 deleted
  Decoding MIME message...
  Decoding quoted-printable... done
  Decoding MIME message... done
  327 messages, 0 new, 0 unread, 0 deleted
  Checking for new mail for /home/jv/Mail/INBOX.201205...
  327 messages, 0 new, 0 unread, 0 deleted
  105 messages, 0 new, 0 unread, 0 deleted
  Decoding MIME message...
  Inlining text/html by w3m, be patient...
  Decoding quoted-printable... done
  Inlining text/html by w3m... done.
  Decoding MIME message... done
  105 messages, 0 new, 0 unread, 0 deleted
  Checking for new mail for /home/jv/INBOX...
  105 messages, 0 new, 0 unread, 0 deleted

Apparently, 8.1.2 takes a different approach when new mail arrives.
That's fine. But why is the summary buffer raised?

I've looked at the changes from 8.1.1 to 8.1.2 but I cannot explain why
this happens.

Note that VM 8.1.1 and 8.1.2 use exactly the same configuration. 

Any help is appreciated.

-- Johan