[O] bug: "org-export-preprocess-string: Wrong number of arguments" when doing "org-export-as-html"

[Karl Voit]

Hi!

Org-mode 7.9.3f (692f053d8 Wed Feb 27 14:49:46 2013 +0100)

#+BEGIN_SRC elisp
(org-export-as-html 3 nil nil "htmlized-output" nil nil)
#+END_SRC

results in:

org-export-preprocess-string: Wrong number of arguments:
#[(&optional sort-only) "<a lot of weird characters>"
[org-inlinetask-min-level limit-level org-odd-levels-only nstars
org-outline-regexp count boundp 2 "\\*" format ...] 7
("/home/vk/.emacs.d/contrib/org-mode/lisp/org-footnote.elc" .
16171)], 2

A couple of weeks ago, it worked flawlessly with a single
difference: in between, the first optional parameter HIDDEN was
added. So I added "nil" as well.

Am I doing something wrong or is this a bug?

-- 
Karl Voit