发布组织文件时出现问题

我正在按照worg中的指示将组织文件发布到HTML。这看起来像是最原始的HTML发布组织。如建议的那样，我评估了以下块：

    (require 'org-publish)
(setq org-publish-project-alist
      '(
    ("org-notes"
     :base-directory "~/www/"
     :base-extension "org"
     :publishing-directory "~/public_html/"
     :recursive t
     :publishing-function org-publish-org-to-html
     :headline-levels 4             ; Just the default for this project.
     :auto-preamble t
     )
    ("org-static"
     :base-directory "~/www/"
     :base-extension "css\\|js\\|png\\|jpg\\|gif\\|pdf\\|mp3\\|ogg\\|swf"
     :publishing-directory "~/public_html/"
     :recursive t
     :publishing-function org-publish-attachment
     )
    ("org" :components ("org-notes" "org-static"))
       ;; ... add all the components here (see below)...
      ))

但是当我运行时M-x org-publish-project RET org RET，出现以下错误：

Symbol's value as variable is void: org-export-html-special-string-regexps

一些谷歌搜索建议这可能是由于安装了多个版本的org。我认为情况并非如此。我在Mac OS X上重新安装了GNU Emacs（第1天），然后使用来更新到最新的组织模式M-x package-install。

有什么建议吗？

编辑1：这是输出M-x org-version：

Org-mode version 8.2.5h (8.2.5h-19-g0ceb68-elpa @ /Users/krishnan/.emacs.d/elpa/org-20140210/)

编辑2：添加了调试信息：

Debugger entered--Lisp error: (void-variable org-export-html-special-string-regexps)
  org-export-html-convert-special-strings("Kaushik Krishnan")
  org-html-do-expand("Kaushik Krishnan")
  org-html-expand("Kaushik Krishnan")
  org-export-as-html(4 (:buffer-will-be-killed t :base-directory "~/www/" :base-extension "org" :publishing-directory "~/public_html/" :recursive t :publishing-function org-publish-org-to-html :headline-levels 4 :auto-preamble t) nil nil "/Users/krishnan/public_html/")
  org-publish-org-to("html" (:base-directory "~/www/" :base-extension "org" :publishing-directory "~/public_html/" :recursive t :publishing-function org-publish-org-to-html :headline-levels 4 :auto-preamble t) "/Users/krishnan/www/index.org" "/Users/krishnan/public_html/")
  org-publish-org-to-html((:base-directory "~/www/" :base-extension "org" :publishing-directory "~/public_html/" :recursive t :publishing-function org-publish-org-to-html :headline-levels 4 :auto-preamble t) "/Users/krishnan/www/index.org" "/Users/krishnan/public_html/")
  org-publish-file("/Users/krishnan/www/index.org" ("org-notes" :base-directory "~/www/" :base-extension "org" :publishing-directory "~/public_html/" :recursive t :publishing-function org-publish-org-to-html :headline-levels 4 :auto-preamble t) t)
  #[(project) "\306@!\210A\307  \310\"\307  \311\"\307  \312\"\206\313\307  \314\"\206#\315\307 \316\"\206- \307    \317\"\2068!\"\307  \320\"\307  \321\"\322\n\"#\323$\203X\324\325!\210\203a
\f\"\210#\211A#@\211$\203x\326$\327#\210\202a\307   \330\"\203\222\331\307  \332\"!\210\326\333\334\307 \332\"\"\327#\210\203\233\324\335!\210\336 .\207" [project project-plist exclude-regexp sitemap-p sitemap-filename sitemap-function org-publish-initialize-cache plist-get :exclude :auto-sitemap :sitemap-filename "sitemap.org" :sitemap-function org-publish-org-sitemap :sitemap-date-format :sitemap-file-entry-format :preparation-function :completion-function org-publish-get-base-files nil run-hooks preparation-function org-publish-file t :makeindex org-publish-index-generate-theindex :base-directory expand-file-name "theindex.org" completion-function org-publish-write-cache-file org-publish-sitemap-date-format org-sitemap-date-format org-publish-sitemap-file-entry-format org-sitemap-file-entry-format files file] 6](("org-notes" :base-directory "~/www/" :base-extension "org" :publishing-directory "~/public_html/" :recursive t :publishing-function org-publish-org-to-html :headline-levels 4 :auto-preamble t))
  mapc(#[(project) "\306@!\210A\307 \310\"\307  \311\"\307  \312\"\206\313\307  \314\"\206#\315\307 \316\"\206- \307    \317\"\2068!\"\307  \320\"\307  \321\"\322\n\"#\323$\203X\324\325!\210\203a
\f\"\210#\211A#@\211$\203x\326$\327#\210\202a\307   \330\"\203\222\331\307  \332\"!\210\326\333\334\307 \332\"\"\327#\210\203\233\324\335!\210\336 .\207" [project project-plist exclude-regexp sitemap-p sitemap-filename sitemap-function org-publish-initialize-cache plist-get :exclude :auto-sitemap :sitemap-filename "sitemap.org" :sitemap-function org-publish-org-sitemap :sitemap-date-format :sitemap-file-entry-format :preparation-function :completion-function org-publish-get-base-files nil run-hooks preparation-function org-publish-file t :makeindex org-publish-index-generate-theindex :base-directory expand-file-name "theindex.org" completion-function org-publish-write-cache-file org-publish-sitemap-date-format org-sitemap-date-format org-publish-sitemap-file-entry-format org-sitemap-file-entry-format files file] 6] (("org-notes" :base-directory "~/www/" :base-extension "org" :publishing-directory "~/public_html/" :recursive t :publishing-function org-publish-org-to-html :headline-levels 4 :auto-preamble t) ("org-static" :base-directory "~/www/" :base-extension "css\\|js\\|png\\|jpg\\|gif\\|pdf\\|mp3\\|ogg\\|swf" :publishing-directory "~/public_html/" :recursive t :publishing-function org-publish-attachment)))
  org-publish-projects((("org" :components ("org-notes" "org-static"))))
  org-publish-project(("org" :components ("org-notes" "org-static")) nil)
  call-interactively(org-publish-project record nil)
  command-execute(org-publish-project record)
  execute-extended-command(nil "org-publish-project")
  call-interactively(execute-extended-command nil nil)