I've mentioned this before, but if users and assuming not too savvy are instructed to delete all their cookies, won't they be deleting all their offline savegames in the process? (And so not just for this site. Plus of course, any stored preferences and live logins etc. for other sites of their choice.)
It's an honest question. Just seems a little drastic; or perhaps more refined instructions are in order. Anyhows, it doesn't seem to address this weird logout problem, in the first place. if anything, they should be directed on how to clear their ArmorGames login cookie, I guess, and it only.