Index: ajax.js
===================================================================
--- ajax.js	(revision 5584)
+++ ajax.js	(working copy)
@@ -453,17 +453,19 @@
 	httpData: function( r, type ) {
 		var ct = r.getResponseHeader("content-type"),
 			xml = type == "xml" || !type && ct && ct.indexOf("xml") >= 0,
+			script = type == "script" || !type && ct && ct.indexOf("script") >= 0,
+			json = type == "json" || !type && ct && ct.indexOf("json") >= 0,
 			data = xml ? r.responseXML : r.responseText;
 
 		if ( xml && data.documentElement.tagName == "parsererror" )
 			throw "parsererror";
 
 		// If the type is "script", eval it in global context
-		if ( type == "script" )
+		if ( script )
 			jQuery.globalEval( data );
 
 		// Get the JavaScript object, if JSON is used.
-		if ( type == "json" )
+		if ( json )
 			data = eval("(" + data + ")");
 
 		return data;