This is v2 of id:1377793557-28878-1-git-send-email-amdragon@mit.edu.
This fixes a problem found by Jani where notmuch-hello would reset
point placement when refreshing in Emacs 24.  It also inverts the
sense of notmuch-hello-auto-refresh and makes it a defcustom
(originally I'd intended notmuch-hello-inhibit-auto-refresh for
internal use only, but both Mark and Jani expressed interest in
setting it).

The diff from v1 follows

diff --git a/emacs/notmuch-hello.el b/emacs/notmuch-hello.el
index 1d6c3a2..55c416a 100644
--- a/emacs/notmuch-hello.el
+++ b/emacs/notmuch-hello.el
@@ -232,6 +232,11 @@ supported for \"Customized queries section\" items."
 	    notmuch-hello-query-section
 	    (function :tag "Custom section"))))
 
+(defcustom notmuch-hello-auto-refresh t
+  "Automatically refresh when returning to the notmuch-hello buffer."
+  :group 'notmuch-hello
+  :type 'boolean)
+
 (defvar notmuch-hello-hidden-sections nil
   "List of sections titles whose contents are hidden")
 
@@ -478,9 +483,6 @@ Such a list can be computed with `notmuch-hello-query-counts'."
   ;; Lazy - rebuild everything.
   (notmuch-hello no-display))
 
-(defvar notmuch-hello-inhibit-auto-refresh nil
-  "Don't refresh notmuch-hello on window configuration changes.")
-
 (defun notmuch-hello-window-configuration-change ()
   "Hook function to update the hello buffer when it is switched to."
   (let ((hello-buf (get-buffer "*notmuch-hello*"))
@@ -501,8 +503,11 @@ Such a list can be computed with `notmuch-hello-query-counts'."
 	    ;; is currently visible, was not visible on the last
 	    ;; configuration change, and this is not a new window)
 	    (setq do-refresh t)))))
-    (when (and do-refresh (not notmuch-hello-inhibit-auto-refresh))
-      (notmuch-hello t))
+    (when (and do-refresh notmuch-hello-auto-refresh)
+      ;; Refresh hello as soon as we get back to redisplay.  On Emacs
+      ;; 24, we can't do it right here because something in this
+      ;; hook's call stack overrides hello's point placement.
+      (run-at-time nil nil #'notmuch-hello t))
     (when (null hello-buf)
       ;; Clean up hook
       (remove-hook 'window-configuration-change-hook
@@ -785,14 +790,15 @@ following:
 
   ;; This may cause a window configuration change, so if the
   ;; auto-refresh hook is already installed, avoid recursive refresh.
-  (let ((notmuch-hello-inhibit-auto-refresh t))
+  (let ((notmuch-hello-auto-refresh nil))
     (if no-display
 	(set-buffer "*notmuch-hello*")
       (switch-to-buffer "*notmuch-hello*")))
 
   ;; Install auto-refresh hook
-  (add-hook 'window-configuration-change-hook
-	    #'notmuch-hello-window-configuration-change)
+  (when notmuch-hello-auto-refresh
+    (add-hook 'window-configuration-change-hook
+	      #'notmuch-hello-window-configuration-change))
 
   (let ((target-line (line-number-at-pos))
 	(target-column (current-column))