Index: wp-includes/js/autosave.js
===================================================================
--- wp-includes/js/autosave.js	(revision 22261)
+++ wp-includes/js/autosave.js	(working copy)
@@ -284,7 +284,7 @@
 			doAutoSave = false;
 		} else {
 			if ( 'mce_fullscreen' == ed.id || 'wp_mce_fullscreen' == ed.id )
-				tinymce.get('content').setContent(ed.getContent({format : 'raw'}), {format : 'raw'});
+				tinymce.get('content').setContent(ed.getContent({format : 'html'}), {format : 'html'});
 			tinymce.triggerSave();
 		}
 	}