Index: wp-includes/js/autosave.js
===================================================================
--- wp-includes/js/autosave.js	(revision 24705)
+++ wp-includes/js/autosave.js	(working copy)
@@ -520,8 +520,8 @@
 	init: function( settings ) {
 		var self = this;
 
-		// Run only on the Add/Edit Post screens and in browsers that have sessionStorage
-		if ( 'post' != window.pagenow || ! this.checkStorage() )
+		// Run only on the Add/Edit Post/Page screens and in browsers that have sessionStorage
+		if ( ( 'post' != window.pagenow && 'page' != window.pagenow ) || ! this.checkStorage() )
 			return;
 		// editor.js has to be loaded before autosave.js
 		if ( typeof switchEditors == 'undefined' )