diff --git a/app/css/desktop.css b/app/css/desktop.css
index aa88269e..b2cc8bd9 100644
--- a/app/css/desktop.css
+++ b/app/css/desktop.css
@@ -1586,7 +1586,7 @@ div.im_dialog_photo .peer_initials {
   background-size: 40px 200px;
   width: 16px;
   height: 24px;
-  opacity: 0.3;
+  opacity: 0.15;
   position: absolute;
   top: 50%;
   pointer-events: none;
diff --git a/app/js/controllers.js b/app/js/controllers.js
index 2fe94653..f937720f 100644
--- a/app/js/controllers.js
+++ b/app/js/controllers.js
@@ -273,8 +273,8 @@ angular.module('myApp.controllers', ['myApp.i18n'])
       if (forceSignUp) {
         method = 'auth.signUp';
         angular.extend(params, {
-          first_name: $scope.credentials.first_name,
-          last_name: $scope.credentials.last_name
+          first_name: $scope.credentials.first_name || '',
+          last_name: $scope.credentials.last_name || ''
         });
       }