Index: include/platform/jquery/jquery-1.3.2.js
===================================================================
--- include/platform/jquery/jquery-1.3.2.js	(revision 5351)
+++ include/platform/jquery/jquery-1.3.2.js	(working copy)
@@ -3428,6 +3428,7 @@
 			// We need to make sure
 			// that a JSONP style response is executed properly
 			s.dataType = "script";
+            s._jsonp = jsonp;
 
 			// Handle JSONP-style loading
 			window[ jsonp ] = function(tmp){
@@ -3475,6 +3476,7 @@
 
 			var head = document.getElementsByTagName("head")[0];
 			var script = document.createElement("script");
+            s._script = script;
 			script.src = s.url;
 			if (s.scriptCharset)
 				script.charset = s.scriptCharset;
@@ -3511,11 +3513,16 @@
 
 		// Open the socket
 		// Passing null username, generates a login popup on Opera (#2865)
+        try {
 		if( s.username )
 			xhr.open(type, s.url, s.async, s.username, s.password);
 		else
 			xhr.open(type, s.url, s.async);
+        } catch(e) {
+            jQuery.handleError(s, xhr, "error");
+        }
 
+
 		// Need an extra try/catch for cross domain requests in Firefox 3
 		try {
 			// Set the correct header, if data is being sent
@@ -3674,6 +3681,14 @@
 		// Fire the global callback
 		if ( s.global )
 			jQuery.event.trigger( "ajaxError", [xhr, s, e] );
+        if( s.dataType == 'script') {
+    		window[ s._jsonp ] = undefined;
+			try{ delete window[ s._jsonp ]; } catch(e){}
+			if ( s._script ) {
+       			var head = document.getElementsByTagName("head")[0];
+				head.removeChild( s._script );
+            }
+        }
 	},
 
 	// Counter for holding the number of active queries