@greatidea
I don't have such an issue, make sure you're using this extension:
www.joomace.net/free-downloads/acesef-extensions/kunena-16
Also, try to delete the Red URLs for Kunena then try again.
@Joe
As you can see it's coused by the new structure of Kunena menu with multiple ItemID. We're working on this. For now, you can disable storing duplicated URLs for Kunena extension from it's paramters page.
@Edgar
I just tested all these action and all works fine. Do you have any Red URLs or any special template?