The default installation of Request Tracker (www-apps/rt-3.6.0) has incorrect default paths setup. The RT library path isn't in the Perl include path, for 3.6.0 this should be: /usr/share/webapps/rt/3.6.0/hostroot/rt-3.6.0/lib, instead of the defaults on line 65 of rt-3.6.0/bin/webmux.pl In addition to that the default DocumentRoot for the apache vhost is incorrect, for 3.6.0 this should be: /usr/share/webapps/rt/3.6.0/htdocs whereas the default specified is: /var/www/localhost/htdocs/rt I'm only reporting this as a bug because it deviates from the install instructions, e.g. it doesn't work out of the box following them.
Don't restrict bugs without any reason. Just leave the checkboxes alone, please.
use webapp-config to install rt. stuff in /usr/share/webapps is the master copy. man webapp-config