In the function org-toggle-iimage-in-org in the page http://orgmode.org/worg/org-configs/org-config-examples.html#sec-2_2
the call (iimage-mode) needs to be (iimage-mode 'toggle), otherwise iimage-mode is only ever switched on. (iimage-mode does toggle when used as a command, but not when called from Lisp.) -- http://rrt.sc3d.org
