The optional argument, INVISIBLE-OK, of org-forward-same-level is not
mentioned in the documentation for that function.

--Aidan

Emacs  : GNU Emacs 24.0.50.3 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2010-09-17 on dimension8
Package: Org-mode version 7.01trans