Index: src/ajax/ajax.js
===================================================================
--- src/ajax/ajax.js	(revision 1396)
+++ src/ajax/ajax.js	(working copy)
@@ -647,6 +647,12 @@
 			// The transfer is complete and the data is available, or the request timed out
 			if ( xml && (xml.readyState == 4 || isTimeout == "timeout") ) {
 				requestDone = true;
+				
+				if (ival) {
+					clearInterval(ival);
+					ival = null;
+				}
+				
 				var status;
 				try {
 					status = jQuery.httpSuccess( xml ) && isTimeout != "timeout" ?
@@ -692,11 +698,13 @@
 					s.complete(xml, status);
 
 				// Stop memory leaks
-				xml.onreadystatechange = function(){};
+				// xml.onreadystatechange = function(){};
 				xml = null;
+				xml2 = null;
 			}
 		};
-		xml.onreadystatechange = onreadystatechange;
+		//xml.onreadystatechange = onreadystatechange;
+		var ival = setInterval(onreadystatechange, 13);
 
 		// Timeout checker
 		if ( s.timeout > 0 )