Comment 40 for bug 369800

I got an answer from Klaus: http://lists.gnu.org/archive/html/emacs-devel/2009-05/msg00188.html

hobbes, could you please replace syntax-ppss-flush-cache in mumamo.el with this one:

(defadvice syntax-ppss-flush-cache (around
                                    mumamo-advice-syntax-ppss-flush-cache
                                    activate
                                    compile
                                    )
  "Support for mumamo.
See the defadvice for `syntax-ppss' for an explanation."
  (if (not mumamo-multi-major-mode)
      ad-do-it
    (let ((pos (ad-get-arg 0)))
      (let* ((chunk-at-pos (when (and (boundp 'mumamo-multi-major-mode)
                                      mumamo-multi-major-mode)
                             (mumamo-find-chunks pos "syntax-ppss-flush-cache"))))
        (if chunk-at-pos
            (let* ((syntax-ppss-last (overlay-get chunk-at-pos 'syntax-ppss-last))
                   (syntax-ppss-cache (overlay-get chunk-at-pos 'syntax-ppss-cache)))
              ;;(setq ad-return-value ad-do-it)
              ad-do-it
              (overlay-put chunk-at-pos 'syntax-ppss-last syntax-ppss-last)
              (overlay-put chunk-at-pos 'syntax-ppss-cache syntax-ppss-cache))
          ;;(setq ad-return-value ad-do-it)
          ad-do-it
          )))))