Nagios Support Forum

IMHO on the page that lets you select between the Customer Support forum vs the General Support forum, the padlock on General Support gives the indication that this is a locked down forum, not for the general public.
It would make more sense that the Customer Support forum had an icon of a padlock on it as you need to be a customer to access these forums.

Then again, maybe it's just my perception

This is obviously a bug in phpbb. It's likely pulling this from the 3 Topics in that forum, ignoring the two sup-forms.

I think perhaps that Forum is locked.