(org-agenda-mode, org-table-edit-formulas):

Make sure that `global-font-lock-mode' does not turn on font-lock
in these buffers.

lisp/textmodes/org.el

@@ -5,7 +5,7 @@
 ;; Author: Carsten Dominik <dominik at science dot uva dot nl>
 ;; Keywords: outlines, hypermedia, calendar, wp
 ;; Homepage: http://www.astro.uva.nl/~dominik/Tools/org/
-;; Version: 4.67c
+;; Version: 4.67d
 ;;
 ;; This file is part of GNU Emacs.
 ;;
@@ -7952,7 +7952,10 @@ Parameters get priority."
 	entry s)
     (switch-to-buffer-other-window "*Edit Formulas*")
     (erase-buffer)
-    (fundamental-mode)
+    ;; Keep global-font-lock-mode from turning on font-lock-mode
+    (let ((font-lock-global-modes '(not fundamental-mode)))
+      (fundamental-mode))
+    (org-set-local 'font-lock-global-modes (list 'not major-mode))
     (org-set-local 'org-pos pos)
     (org-set-local 'org-window-configuration wc)
     (use-local-map org-edit-formulas-map)
@@ -12945,6 +12948,8 @@ The following commands are available:
   (setq org-agenda-undo-list nil
 	org-agenda-pending-undo-list nil)
   (setq major-mode 'org-agenda-mode)
+  ;; Keep global-font-lock-mode from turning on font-lock-mode
+  (org-set-local 'font-lock-global-modes (list 'not major-mode))
   (setq mode-name "Org-Agenda")
   (use-local-map org-agenda-mode-map)
   (easy-menu-add org-agenda-menu)