OK - I just realized that the htaccess doesn't seem to be working well at all, that could fix all of this. It should be standardizing whether people are seeing ninjette.org or
www.ninjette.org, and it's not; so the cookies are failing as it hops between them. This is fixable tonight.
In the meantime, as long as you start at
www.ninjette.org, you shouldn't have any issue. It's only if people start at ninjette.org, where the redirect error sometimes shows up on the portal.