[Bug-AUCTeX] 11.86; I report this bug

[劉世家]

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what in fact did happen.

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up-to-date version of AUCTeX.  So please upgrade to the version
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there is preview and command in menu bar, but the preview don't work,
when I try the preview(the menu bar botton),it shows the a forbidden
mark(red circle white line)the "$balabalabala$" just disappares, and
right click the forbidden mark chose "show error" it says this:
Please help me solve this problem. And Merry Xmars.

Emacs  : GNU Emacs 23.3.1 (x86_64-apple-darwin10.7.0, NS apple-appkit-1038.35)
of 2011-04-20 on s210-2.pubnet.titech.ac.jp
Package: 11.86

current state:
==============
(setq
AUCTeX-date "2010-02-21"
window-system 'ns
LaTeX-version "2e"
TeX-style-path '("/usr/local/var/auctex"
                  
"/Applications/Emacs.app/Contents/Resources/site-lisp/auctex/style" 
"/Users/ryu/.emacs.d/auctex/auto" "/Users/ryu/.emacs.d/auctex/style" "auto" 
"style")
TeX-auto-save nil
TeX-parse-self nil
TeX-master t
TeX-command-list '(("TeX" "%(PDF)%(tex) %`%S%(PDFout)%(mode)%' %t"
                     TeX-run-TeX nil
                     (plain-tex-mode ams-tex-mode texinfo-mode) :help
                     "Run plain TeX")
                    ("LaTeX" "%`%l%(mode)%' %t" TeX-run-TeX nil
                     (latex-mode doctex-mode) :help "Run LaTeX")
                    ("Makeinfo" "makeinfo %t" TeX-run-compile nil
                     (texinfo-mode) :help "Run Makeinfo with Info output")
                    ("Makeinfo HTML" "makeinfo --html %t" TeX-run-compile nil
                     (texinfo-mode) :help "Run Makeinfo with HTML output")
                    ("AmSTeX" "%(PDF)amstex %`%S%(PDFout)%(mode)%' %t"
                     TeX-run-TeX nil (ams-tex-mode) :help "Run AMSTeX")
                    ("ConTeXt" "texexec --once --texutil %(execopts)%t"
                     TeX-run-TeX nil (context-mode) :help "Run ConTeXt once")
                    ("ConTeXt Full" "texexec %(execopts)%t" TeX-run-TeX nil
                     (context-mode) :help "Run ConTeXt until completion")
                    ("BibTeX" "bibtex %s" TeX-run-BibTeX nil t :help
                     "Run BibTeX")
                    ("View" "%V" TeX-run-discard-or-function t t :help
                     "Run Viewer")
                    ("Print" "%p" TeX-run-command t t :help "Print the file")
                    ("Queue" "%q" TeX-run-background nil t :help
                     "View the printer queue" :visible TeX-queue-command)
                    ("File" "%(o?)dvips %d -o %f " TeX-run-command t t :help
                     "Generate PostScript file")
                    ("Index" "makeindex %s" TeX-run-command nil t :help
                     "Create index file")
                    ("Check" "lacheck %s" TeX-run-compile nil (latex-mode)
                     :help "Check LaTeX file for correctness")
                    ("Spell" "(TeX-ispell-document \"\")" TeX-run-function nil
                     t :help "Spell-check the document")
                    ("Clean" "TeX-clean" TeX-run-function nil t :help
                     "Delete generated intermediate files")
                    ("Clean All" "(TeX-clean t)" TeX-run-function nil t :help
                     "Delete generated intermediate and output files")
                    ("Other" "" TeX-run-command t t :help
                     "Run an arbitrary command")
                    )
)