--- a/app.js	Thu Jun 02 11:31:24 2016 +0200
+++ b/app.js	Thu Jun 02 17:32:59 2016 +0200
@@ -78,7 +78,7 @@
         Lada.logintime = '';
         Lada.mst = [];
         Lada.netzbetreiber = [];
-        Lada.clientVersion = '2.2-STAMMDATEN';
+        Lada.clientVersion = '2.3';
         Lada.serverVersion = '';
 
         var queryString = document.location.href.split('?')[1];

--- a/app/view/widget/Netzbetreiber.js	Thu Jun 02 11:31:24 2016 +0200
+++ b/app/view/widget/Netzbetreiber.js	Thu Jun 02 17:32:59 2016 +0200
@@ -39,6 +39,9 @@
 
     getValue: function() {
         var value = this.down('combobox').getValue();
+        if (value === undefined || value === null || value === '') {
+            return [];
+        }
         if (value instanceof Array) {
             return value;
         }