Index: class.t3lib_div.php
===================================================================
--- class.t3lib_div.php	(Revision 17857)
+++ class.t3lib_div.php	(Arbeitskopie)
@@ -4065,7 +4065,8 @@
 		foreach($params as $theP)	{
 			$pKV = explode('=', $theP);	// Splitting single param by '=' sign
 			if (!t3lib_div::inList('id,type,no_cache,cHash,MP,ftu,L',$pKV[0]) && !preg_match('/TSFE_ADMIN_PANEL\[.*?\]/',$pKV[0]))	{
-				$pA[rawurldecode($pKV[0])] = (string)rawurldecode($pKV[1]);
+				$paramsValue = (string)rawurldecode($pKV[1]);
+				if($paramsValue) $pA[rawurldecode($pKV[0])] = $paramsValue;
 			}
 		}
 			// Hook: Allows to manipulate the parameters which are taken to build the chash:
@@ -4083,9 +4084,12 @@
 				}
 			}
 		}
+		
 			// Finish and sort parameters array by keys:
-		$pA['encryptionKey'] = $GLOBALS['TYPO3_CONF_VARS']['SYS']['encryptionKey'];
-		ksort($pA);
+		if(count($pA)){
+			$pA['encryptionKey'] = $GLOBALS['TYPO3_CONF_VARS']['SYS']['encryptionKey'];
+			ksort($pA);
+		}
 
 		return $pA;
 	}