Please ignore my bug report for the moment. org works if I don't invoke any of my customisations. I have obviously set something that makes the updating of the cookie fail. Not sure what, mind you... Any suggestions welcome, of course.
Sorry for the noise. -- : Eric S Fraga (0xFFFCF67D), Emacs 25.0.50.1, Org release_8.3beta-1147-g0e5069