тоже столкнулся с этой ситуацией. В инете нашел вот такое решение. прокомментируйте пож. недопонимаю.

I was trying to find an alternative to $_SERVER['REQUEST_URI'] for a Windows NT set up and the ones below didn't really work for me so here's my solution using eustf at hotmail dot com's suggestion of $_SERVER['PHP_SELF']:

// if 'REQUEST_URI' isn't available then ...
if(!isset($_SERVER['REQUEST_URI'])) {

// ... set my own request url and ...
$temp_request_url = $_SERVER['PHP_SELF'];

// ... test for and add url variables to my request url ...
if (isset($HTTP_SERVER_VARS['QUERY_STRING'])) {
$temp_request_url .= (strpos($updateGoTo, '?')) ? "&" : "?";
$temp_request_url .= $HTTP_SERVER_VARS['QUERY_STRING'];
}

} else {
// ... otherwise use the regular 'REQUEST_URI'
$temp_request_url = $_SERVER['REQUEST_URI'];
}