Hi,
We recently switched moodle.org to https to improve general security around the site.
Any links to http://moodle.org will be redirected, but there might be a glitch here and there with some of the many custom systems built around this site. If you find anything please help us by filing new bug reports in the Moodle Tracker here:
http://tracker.moodle.org/browse/MDLSITE/component/10111
Cheers,
Martin