But with IE 6.0 the $r->uri and $r->headers_in->get('Referer') is
different than for NN.
as you're seeing, the Referer header is pretty unreliable due to the different ways browsers implement it.
you should probably switch to a different method for this, such as specifying the environment through a PerlSetVar, or maybe passing it around in a form field, the query string, or extra path info or something.
HTH
--Geoff
