diff --git a/phpgwapi/inc/class.xmlrpc_server_php.inc.php b/phpgwapi/inc/class.xmlrpc_server_php.inc.php
index aa33f9bf4c..b01c2a54dc 100644
--- a/phpgwapi/inc/class.xmlrpc_server_php.inc.php
+++ b/phpgwapi/inc/class.xmlrpc_server_php.inc.php
@@ -92,10 +92,11 @@
 			}
 			else
 			{
-				$payload = "<?xml version=\"1.0\"?>\n" . $this->serializeDebug() . $r->serialize();
+				$payload = $GLOBALS['egw']->translation->convert("<?xml version=\"1.0\"?>\n" . $this->serializeDebug() . $r->serialize(),
+					$GLOBALS['egw']->translation->charset(),'utf-8');
 				header("Content-type: text/xml");
-				header("Content-length: " . strlen($payload));
-				echo $GLOBALS['egw']->translation->convert($payload,$GLOBALS['egw']->translation->charset(),'utf-8');
+				header("Content-length: " . $this->bytes($payload));
+				echo $payload;
 			}
 
 			if ($this->log)
@@ -119,10 +120,28 @@
 				fclose($fp);
 			}
 		}
+		
+		/**
+		 * mbstring.func_overload save strlen version: counting the bytes not the chars
+		 *
+		 * @param string $str
+		 * @return int
+		 */
+		function bytes($str)
+		{
+			static $func_overload;
+
+			if (is_null($func_overload))
+			{
+				$func_overload = @extension_loaded('mbstring') ? ini_get('mbstring.func_overload') : 0;
+			}
+			return $func_overload & 2 ? mb_strlen($str,'ascii') : strlen($str);
+		}
+		
 
 		/*
-		add a method to the dispatch map
-		*/
+		 * add a method to the dispatch map
+		 */
 		function add_to_map($methodname,$function,$sig,$doc)
 		{
 			$this->dmap[$methodname] = array(