I have a fresh install of Joomla 1.6, and a fresh install of NinjaBoard; I get these errors generated immediately after NinjaBoard install:
Error loading component: com_agora, 1
Error loading component: com_ccboard, 1
Error loading component: com_kunena, 1
Error loading component: com_agora, 1
Error loading component: com_ccboard, 1
Error loading component: com_kunena, 1
I 777'd the directories indicated in the NinjaBoard Installation guide, as I am on a UNIX server, and the error flags disappeared; The only error remaining was a indication that I needed to change my database configuration to SQLi; I went to Joomla's global configuration and changed the SQL to SQLi, and that resolved said error message; the only thing remaining is the list of "component" errors, which only show up on my "tools" tab in the NinjaBoard Dashboard. I would like to resolve this issue before furthering my NinjaBoard. The following is a list of specs for the system I am running my site on:
PHP Built On: Linux cx113.justhost.com
Database Version: 5.0.91-community
Database Collation: utf8_general_ci
PHP Version: 5.2.15
Web Server: Apache
WebServer to PHP Interface: cgi
Joomla! Version: Joomla! 1.6.0 Stable [ Onward ] 10-Jan-2011 23:00 GMT
User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.237 Safari/534.10
PECL Module version (bundled) 1.0.1 $Id: pdo_sqlite.c 293036 sebastian $
SQLite Library 3.3.7

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