--- a/.emacs-my	Mon Sep 27 15:21:17 2010 +0300
+++ b/.emacs-my	Tue Sep 28 23:44:56 2010 +0300
@@ -397,6 +397,11 @@
 (if window-system (global-set-key (kbd "C-z") nil))
 (global-set-key (kbd "C-x C-z") nil)
 
+;; Make old Emacs key binding like in Emacs 23.x.
+(when (< emacs-major-version 23)
+  (global-set-key (kbd "M-s o") 'occur)
+  )
+
 ;; (global-set-key [language-change] 'ignore)
 
 ;;; ----------------------------------------------------------------