Trouble with Emacs24 on Debian

[Lorenzo Isella]

Dear All,
I am running debian testing on my box.
After an update, I discovered that emacs sends out an error message while 
processing my .emacs file (which is a bit long and messy, I admit that, but it 
does what I need and never gave me a problem in the past).
However, if I run emacs23, everything is fine and I get no error message.
Please find at the end of the email the message I get when I run

emacs24 --debug-init

For me it is Greek, so any suggestion is really appreciated.
Cheers

Lorenzo


#########################################################################à

Debugger entered--Lisp error: (void-function ad-advised-definition-p)
 (ad-advised-definition-p (quote other-window))
   (if (ad-advised-definition-p (quote other-window)) (progn 
(sr-speedbar-handle-other-window-advice value)))
     (lambda (symbol value) (set symbol value) (if (ad-advised-definition-p 
(quote other-window)) (progn (sr-speedbar-handle-other-window-advice 
value))))(sr-speedbar-skip-other-window-p nil)
       custom-initialize-reset(sr-speedbar-skip-other-window-p nil)
          custom-declare-variable(sr-speedbar-skip-other-window-p nil "Whether skip 
`sr-speedbar' window with `other-window'.\nDefault, can use `other-window' select window 
in cyclic\nordering of windows.  But sometimes we don't want select\n`sr-speedbar' window 
use `other-window'.\nJust want make `sr-speedbar' window as a view sidebar.\n\nSo please 
turn on this option if you want skip\n`sr-speedbar' window with 
`other-window'.\n\nDefault is nil." :type boolean :set (lambda (symbol value) (set 
symbol value) (if (ad-advised-definition-p (quote other-window)) (progn 
(sr-speedbar-handle-other-window-advice value)))) :group sr-speedbar)
            eval-buffer(#<buffer  *load*-771461> nil 
"/usr/share/emacs/site-lisp/sr-speedbar.el" nil t)  ; Reading at buffer position 10279
              load-with-code-conversion("/usr/share/emacs/site-lisp/sr-speedbar.el" 
"/usr/share/emacs/site-lisp/sr-speedbar.el" nil t)
                require(sr-speedbar)
                  eval-buffer(#<buffer  *load*> nil "/home/lorenzo/.emacs" nil 
t)  ; Reading at buffer position 3251
                    load-with-code-conversion("/home/lorenzo/.emacs" 
"/home/lorenzo/.emacs" t t)
                      load("~/.emacs" t t)
                        #[0 "205\262