Re: [O] why I got the message

[Dillon Peng]

hi,
   I figured out!
   after restart emacs with (require 'ox),  I found a strange error message: 
Wrong type argument: integerp, (48 . 57)
and the error message disapeared after updating emacs from 24.0.95-1 to 
24.1-7, and M-S-<left> also works! 
  thanks again!