diff --git a/www/code/inner.js b/www/code/inner.js
index 7b654a3b1..3ffb2baef 100644
--- a/www/code/inner.js
+++ b/www/code/inner.js
@@ -452,6 +452,7 @@ define([
             markers.ready();
             common.getPadMetadata(null, function (md) {
                 if (md && md.error) { return; }
+                if (!Array.isArray(md.owners)) { return void markers.setState(false); }
                 if (!common.isOwned(md.owners)) { return; }
                 // We're the owner: add the button and enable the colors if needed
                 mkColorByAuthor(framework, markers);
diff --git a/www/code/markers.js b/www/code/markers.js
index fb44707e0..bf3f00f82 100644
--- a/www/code/markers.js
+++ b/www/code/markers.js
@@ -46,7 +46,7 @@ define([
             inclusiveRight: uid === Env.myAuthorId,
             css: "background-color: " + rgba,
             attributes: {
-                title: Env.opacity ? Messages._getKey('cba_writtenBy', [name]) : undefined,
+                title: Env.opacity ? Messages._getKey('cba_writtenBy', [name]) : '',
                 'data-type': 'authormark',
                 'data-uid': uid
             }
@@ -689,7 +689,7 @@ define([
 
     Markers.create = function (config) {
         var Env = config;
-        Env.authormarks = Util.clone(DEFAULT);
+        Env.authormarks = {};
         Env.enabled = false;
         Env.myAuthorId = 0;