Thanks for your reply.  I have narrowed down the problem.

As I expected, if "auto-complete-mode" is commented out, the problem did not
happen.

--------------------------------
;;auto-complete-mode
 (require 'auto-complete-config)
 (global-auto-complete-mode 1)
 (add-to-list 'ac-dictionary-directories "~/.emacs.d/site-lisp/ac/ac-dict")
 (ac-config-default)
--------------------------------

But I like auto-complete-mode, though.  What am I supposed to do next?

Soichi


2010/11/14 Lennart Borgman <lennart.borgman@gmail.com>

> On Sat, Nov 13, 2010 at 10:57 PM, ishi soichi <soichi777@gmail.com> wrote:
> > hi.  I am not sure if this is a bug.  Maybe it is due to the settings of
> my
> > emacs.
> > When typing "border: " in CSS file (of course, the emacs is in css-mode),
> > emacs freezes itself.  And this happens EVERYTIME!
> > I am not sure what to provide as the background information other than
> the
> > phenomenon described above, here is my environment.
> > Cocoa Emacs Version 23.2 (9.0)
> > MacOS Snow Leopard 10.6.4
>
> Try to narrow down the problem by starting from a clean Emacs with
>
>  emacs -Q
>