i installed Groundwork on a 32bit PC ( SuSE 10 ) -> same problem. Running /usr/local/groundwork/feeder/nagios2db_hostgroupcheck.pl after commit has no effect.
Perhaps a SuSE 10 &qu; ...
Take a look at /usr/local/groundwork/apache2/conf/http.conf. As you see, the file is empty. Just copy the httpd.conf.bak to http.conf and it will work.