Index: trunk/core/kernel/session/session.php
===================================================================
diff -u -r2673 -r2674
--- trunk/core/kernel/session/session.php	(.../session.php)	(revision 2673)
+++ trunk/core/kernel/session/session.php	(.../session.php)	(revision 2674)
@@ -308,7 +308,11 @@
 
 	function IsHTTPSRedirect()
 	{
-		return (PROTOCOL == 'https://' && preg_match('#http:\/\/#', $_SERVER['HTTP_REFERER']));
+		return (
+						(PROTOCOL == 'https://' && preg_match('#http:\/\/#', $_SERVER['HTTP_REFERER']))
+						||
+						(PROTOCOL == 'http://' && preg_match('#https:\/\/#', $_SERVER['HTTP_REFERER']))
+					);
 	}
 
 	function CheckReferer()