No refresh for guest users

Shoutbox 6.x-1.x-dev (2008-Jun-02) works fine for registered users. If a guest user shouts something, the registeres users see it with the next Ajax refresh. The guest user's Shoutbox is updated on submit but on the next Ajax refresh, the old state is restored. If a registered user shouts something, the guest users don't get an update. You can see the problem by viewing the file "shoutbox/js/view", which is polled by Ajax. For guest users, this file doesn't update, for registered users it does. I can force an update for guest users by running "cron.php".

Originally posted here.