diff --git a/ui (gen4)/features/filesystem.js b/ui (gen4)/features/filesystem.js
index b0a3bf54..bcc1c67b 100755
--- a/ui (gen4)/features/filesystem.js	
+++ b/ui (gen4)/features/filesystem.js	
@@ -1760,6 +1760,8 @@ var FileSystemWriterActions = actions.Actions({
 	//				.then(function(){
 	//					ig.markChanged('images')
 	//					console.log('done.') })
+	// XXX when no previews present this should create at least one file
+	// 		of max_size...
 	// 			
 	exportIndex: ['- File/Export/Export index',
 		function(path, max_size, include_orig, clean_target_dir, logger){