Quick help and popup help for elisp are not functional in Emacs 24 about auto-complete HOT 3 CLOSED

diff -c -L /tmp/auto-complete-1.3.1/auto-complete.el -L \#\<buffer\ auto-complete.el\> /tmp/auto-complete-1.3.1/auto-complete.el /tmp/buffer-content-5489wyW
*** /tmp/auto-complete-1.3.1/auto-complete.el
--- #<buffer auto-complete.el>
***************
*** 1691,1697 ****
          (princ " is ")
          (cond
           ((fboundp symbol)
!           (let ((help-xref-following t))
              (describe-function-1 symbol))
            (buffer-string))
           ((boundp symbol)
--- 1691,1698 ----
          (princ " is ")
          (cond
           ((fboundp symbol)
!           (let ((major-mode 'help-mode)
!                 (help-xref-following t))
              (describe-function-1 symbol))
            (buffer-string))
           ((boundp symbol)

Diff finished.  Mon Jan 30 00:05:00 2012