download-original.js: fix interactions

js/download-original.js

@@ -15,7 +15,7 @@
  */
 
 onready(function(){
-	$('.postfilename').each(function() {
+	var do_original_filename = function() {
 		var filename, truncated;
 		if ($(this).attr('title')) {
 			filename = $(this).attr('title');
@@ -31,5 +31,11 @@ onready(function(){
 				.attr('href', $(this).parent().parent().find('a').attr('href'))
 				.attr('title', _('Save as original filename') + (truncated ? ' (' + filename + ')' : ''))
 			);
+	};
+
+	$('.postfilename').each(do_original_filename);
+
+        $(document).bind('new_post', function(e, post) {
+		$(post).find('.postfilename').each(do_original_filename);
 	});
 });