Index: branches/5.0.x/core/kernel/utility/http_query.php
===================================================================
diff -u -r12368 -r12401
--- branches/5.0.x/core/kernel/utility/http_query.php	(.../http_query.php)	(revision 12368)
+++ branches/5.0.x/core/kernel/utility/http_query.php	(.../http_query.php)	(revision 12401)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: http_query.php 12368 2009-08-23 21:55:59Z alex $
+* @version	$Id: http_query.php 12401 2009-09-01 19:34:30Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -581,31 +581,33 @@
 	 */
 	function getRedirectParams($access_error = false)
 	{
+		$vars = $this->Get;
 		$unset_vars = Array (ENV_VAR_NAME, 'rewrite', '_mod_rw_url_', 'Action');
 
 		if (!$this->_sidInQueryString) {
 			$unset_vars[] = 'sid';
 		}
 
-		$ret = $this->Get;
+		// remove system variables
 		foreach ($unset_vars as $var_name) {
-			if( isset($ret[$var_name]) ) {
-				unset( $ret[$var_name] );
+			if (array_key_exists($var_name, $vars)) {
+				unset($vars[$var_name]);
 			}
 		}
 
 		if ($access_error) {
-			$ret = $this->_removePassThroughVariables($ret);
+			$vars = $this->_removePassThroughVariables($vars);
 
 			if ($this->Application->IsAdmin()) {
 				// place 1 of 2 (also in UsersEventHandler::OnSessionExpire)
-				$ret['m_cat_id'] = 0; // category means nothing on admin login screen
-				$ret['m_wid'] = ''; // remove wid, otherwise parent window may add wid to its name breaking all the frameset (for <a> targets)
-				$ret['pass'] = 'm'; // don't pass any other (except "m") prefixes to admin login template
+				$vars['m_cat_id'] = 0; // category means nothing on admin login screen
+				$vars['m_wid'] = ''; // remove wid, otherwise parent window may add wid to its name breaking all the frameset (for <a> targets)
+				$vars['pass'] = 'm'; // don't pass any other (except "m") prefixes to admin login template
 			}
 		}
 
-		return $ret;
+		// transform arrays
+		return $this->_transformArrays($vars);
 	}
 
 	/**
@@ -631,6 +633,23 @@
 		return $url_params;
 	}
 
+	function _transformArrays($array, $level_prefix = '')
+	{
+		$ret = Array ();
+		foreach ($array as $var_name => $var_value) {
+			$new_var_name = $level_prefix ? $level_prefix . '[' . $var_name . ']' : $var_name;
+
+			if (is_array($var_value)) {
+				$ret = array_merge($ret, $this->_transformArrays($var_value, $new_var_name));
+			}
+			else {
+				$ret[$new_var_name] = $var_value;
+			}
+		}
+
+		return $ret;
+	}
+
 	function writeRequestLog($filename)
 	{
 		$folder_path = dirname(FULL_PATH.'/'.$filename);