diff --git a/modoboa/static/js/global.js b/modoboa/static/js/global.js
index a1c11a2a9..085b4c6b8 100644
--- a/modoboa/static/js/global.js
+++ b/modoboa/static/js/global.js
@@ -136,6 +136,7 @@ function display_form_errors(formid, data) {
         var $widget = $("#" + formid + " #" + fullid);
         var spanid = fullid + "-error";
         var $span = $("#" + spanid);
+        var error = value.join(' ');
 
         if (!$widget.parents(".form-group").hasClass("has-error")) {
             $widget.parents(".form-group").addClass("has-error");
@@ -143,12 +144,12 @@ function display_form_errors(formid, data) {
         if (!$span.length) {
             $span = $("<span />", {
                 "class": "help-block",
-                "html": value[0],
+                "html": error,
                 "id": spanid
             });
             $widget.parents(".form-group").append($span);
         } else {
-            $span.html(value[0]);
+            $span.html(error);
         }
     });
 }
diff --git a/modoboa/static/js/twocols_nav.js b/modoboa/static/js/twocols_nav.js
index 3401e0933..0903276b0 100644
--- a/modoboa/static/js/twocols_nav.js
+++ b/modoboa/static/js/twocols_nav.js
@@ -36,13 +36,15 @@ TwocolsNav.prototype = {
                 success_cb: $.proxy(this.save_cb, this)
             });
         }, this));
-        $(document).on('submit', '#parameters_form', $.proxy(function(evt) {
+        var formId = 'parameters_form';
+        $(document).on('submit', '#' + formId, $.proxy(function(evt) {
             simple_ajax_form_post(evt, {
-                formid: $(this).attr('id'),
+                formid: formId,
                 modal: false,
                 reload_on_success: false,
                 success_cb: $.proxy(this.save_cb, this),
                 error_cb: function(data) {
+                    window.scrollTo(0, 0);
                     $('a[data-app="' + data.prefix + '"]').tab('show');
                 }
             });