bug#17845: Re-opening; can repro on GNU Emacs 24.3.91.1

[Duncan Bayne]

I've upgraded to GNU Emacs 24.3.91.1, built from source.  The problem
persists; every time I start Emacs and do 'M-x gnus', it performs an
'initial sync' of all my IMAP folders.

Details from report-emacs-bug:

In GNU Emacs 24.3.91.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.17)
 of 2014-06-26 on duncan-greensync
Windowing system distributor `The X.Org Foundation', version
11.0.11303000
System Description:     Linux Mint 15 Olivia

Important settings:
  value of $LANG: en_AU.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gnus-undo-mode: t
  global-diff-hl-mode: t
  diff-auto-refine-mode: t
  global-auto-revert-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  global-hl-line-mode: t
  global-linum-mode: t
  linum-mode: t
  delete-selection-mode: t
  cua-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
M-x g n u s <return> y M-x r e p o r <tab> <return
>

Recent messages:
Checking new news...
nnimap read 0k from mail.messagingengine.com (initial sync of 22 groups;
please wait) [5 times]
nnimap read 28k from mail.messagingengine.com (initial sync of 22
groups; please wait)
nnimap read 73k from mail.messagingengine.com (initial sync of 22
groups; please wait)
nnimap read 125k from mail.messagingengine.com (initial sync of 22
groups; please wait)
nnimap read 203k from mail.messagingengine.com (initial sync of 22
groups; please wait)
nnimap read 337k from mail.messagingengine.com (initial sync of 22
groups; please wait)
nnimap read 528k from mail.messagingengine.com (initial sync of 22
groups; please wait)
Reading active file via nndraft...done
Checking new news...done

Load-path shadows:
~/.emacs.d/ruby-mode/ruby-mode hides
/usr/local/share/emacs/24.3.91/lisp/progmodes/ruby-mode
~/.emacs.d/emms/tq hides
/usr/local/share/emacs/24.3.91/lisp/emacs-lisp/tq
/usr/local/share/emacs/24.3.91/lisp/emacs-lisp/cl-lib hides
~/.emacs.d/cl-lib/cl-lib

Features:
(shadow sort mail-extr emacsbug sendmail nndraft nnmh nnfolder utf-7
gnutls network-stream auth-source eieio eieio-core starttls nnimap
parse-time tls utf7 netrc gnus-agent gnus-srvr gnus-score score-mode
nnvirtual gnus-msg gnus-art mm-uu mml2015 epg-config mm-view mml-smime
smime password-cache dig mailcap nntp gnus-cache gnus-sum nnoo
gnus-group gnus-undo nnmail mail-source gnus-start gnus-spec gnus-int
gnus-range message format-spec rfc822 mml mml-sec mm-decode mm-bodies
mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev
gmm-utils mailheader gnus-win diff-hl face-remap vc-hg vc-git vc-dir
ewoc vc vc-dispatcher diff-mode geiser emotion-iconous-mode xml
jabber-autoloads gnus gnus-ems nnheader gnus-util mail-utils mm-util
mail-prsvr wid-edit ws-trim tomatinho autorevert filenotify
find-file-in-project warnings ido undo-tree slime pp hyperspec
browse-url multi-term term disp-table ehelp jka-compr-ccrypt jka-compr
hl-line linum delsel cua-base php-mode etags speedbar sb-image ezimage
dframe yaml-mode feature-mode cucumber-mode sass-mode coffee-mode comint
ansi-color ring js2-mode cc-langs haml-mode js advice help-fns byte-opt
bytecomp byte-compile cconv json imenu cc-mode cc-fonts cc-guess
cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs
markdown-mode derived edmacro kmacro thingatpt noutline outline
easy-mmode easymenu css-mode smie ruby-mode cl-macs cl gv cl-loaddefs
cl-lib duncans_emacs time-date tooltip electric uniquify ediff-hook
vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode register
page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core frame cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew
greek romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process gfilenotify
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty emacs)

Memory information:
((conses 16 422701 21099)
 (symbols 48 41562 1)
 (miscs 40 114 212)
 (strings 32 71710 10626)
 (string-bytes 1 2301646)
 (vectors 16 27298)
 (vector-slots 8 581006 8205)
 (floats 8 294 249)
 (intervals 56 293 0)
 (buffers 960 23)
 (heap 1024 28463 2674))