Index: wp-includes/js/jquery/suggest.js
===================================================================
--- wp-includes/js/jquery/suggest.js	(revision 26220)
+++ wp-includes/js/jquery/suggest.js	(working copy)
@@ -250,6 +250,7 @@
 					$input.val($currentResult.text());
 				}
 				$results.hide();
+				$input.trigger( 'change' );
 
 				if (options.onSelect)
 					options.onSelect.apply($input[0]);