Index: languages_item.php
===================================================================
--- languages_item.php	(revision 15602)
+++ languages_item.php	(working copy)
@@ -207,19 +207,14 @@
 					$res = parent::Load(1, 'PrimaryLang', $cachable);
 				}
 
-				if (
-					!$this->Application->isAdmin && !defined('GW_NOTIFY') && preg_match('/[\/]{0,1}index.php[\/]{0,1}/', $_SERVER['PHP_SELF']) &&
-					$this->Application->HttpQuery->isEmptyUrl() && $this->Application->ConfigValue('UseContentLanguageNegotiation')
+				if ( !$this->Application->isAdmin && !defined('GW_NOTIFY') && preg_match('/[\/]{0,1}index.php[\/]{0,1}/', $_SERVER['PHP_SELF']) && $this->Application->ConfigValue('UseContentLanguageNegotiation') && !$this->Application->HttpQuery->refererIsOurSite()
 				) {
 					$language_id = $this->processAcceptLanguage();
 
-					if ($language_id != $this->GetID()) {
+					if ( $language_id != $this->GetID() ) {
 						// redirect to same page with found language
-						$url_params = Array (
-							'm_cat_id' => 0, 'm_cat_page' => 1,
-							'm_lang' => $language_id, 'm_opener' => 's',
-							'pass' => 'm'
-						);
+						$url_params = Array ('m_cat_id' => 0, 'm_cat_page' => 1, 'm_lang' => $language_id,
+							'm_opener' => 's', 'pass' => 'm');
 
 						$this->_addLoginState($url_params);
 						$exception = new kRedirectException('Redirect into language ID = <strong>' . $language_id . '</strong> according to "<strong>Accepted-Language</strong>" header "<strong>' . $_SERVER['HTTP_ACCEPT_LANGUAGE'] . '</strong>"');