http://www.perlmonks.org?node_id=945930


in reply to Re^3: Apache Registry with Server Side Includes
in thread Apache Registry with Server Side Includes

Try using CGI::Simple instead of CGI.pm (at least for testing purposes).   I've occasionally seen similar weirdness with CGI.pm (i.e. parameters not being cleared/reread upon subsequent requests) when being used in persistent contexts, and switching to CGI::Simple fixed it.