Index: wp-includes/js/wplink.dev.js
===================================================================
--- wp-includes/js/wplink.dev.js	(revision 19456)
+++ wp-includes/js/wplink.dev.js	(working copy)
@@ -30,11 +30,14 @@
 			// Bind event handlers
 			inputs.dialog.keydown( wpLink.keydown );
 			inputs.dialog.keyup( wpLink.keyup );
-			inputs.submit.click( function(e){
+			inputs.submit.click( function( e ) {
 				wpLink.update();
 				e.preventDefault();
 			});
-			$('#wp-link-cancel').click( wpLink.close );
+			$('#wp-link-cancel').click( function( e ) {
+				wpLink.close();
+				e.preventDefault();
+			});
 			$('#internal-toggle').click( wpLink.toggleInternalLinking );
 
 			rivers.elements.bind('river-select', wpLink.updateFields );