if not term just use empty string

src/webserver.js

@@ -740,11 +740,14 @@ var path = require('path'),
 			});
 		});
 
-		app.get('/search/:term', function (req, res) {
+		app.get('/search/:term?', function (req, res) {
+
 			if (!req.user && meta.config.allowGuestSearching !== '1') {
 				return res.redirect('/403');
 			}
-
+			if(!req.params.term) {
+				req.params.term = '';
+			}
 			app.build_header({
 				req: req,
 				res: res