diff --git a/WebKit/scripts/helper/Core.js b/WebKit/scripts/helper/Core.js
index b85d6b0..8e26c1e 100644
--- a/WebKit/scripts/helper/Core.js
+++ b/WebKit/scripts/helper/Core.js
@@ -533,7 +533,15 @@ function(jQuery, Paths, URI, HostApp, Cache) {
         post += blob_string;
         post += "\r\n--" + boundary + "--\r\n";
 
-        Paths.postMultipart(url.toString(), callback, post, boundary);
+        var newCallback = function(resp) {
+            if (resp.status == 403) {
+                var err = JSON.parse(resp.responseText);
+                HostApp.alertTitleWithMessage(resp.statusText, err.error);
+            }
+            callback(resp);
+        }
+
+        Paths.postMultipart(url.toString(), newCallback, post, boundary);
     }
 
     Core.prototype.remove = function(id, callback) {
diff --git a/WebKit/scripts/helper/HostApp.js b/WebKit/scripts/helper/HostApp.js
index 0d2ddcf..29358cf 100644
--- a/WebKit/scripts/helper/HostApp.js
+++ b/WebKit/scripts/helper/HostApp.js
@@ -46,6 +46,15 @@ define(function() {
         }
     }
 
+    HostApp.openAuthorizationURL = function(url) {
+
+        if (OS_TYPE == "mac") {
+            controller.openURL_(url);
+        } else {
+            controller.openAuthorizationURL(url);
+        }
+    }
+
     HostApp.loggedIn = function() {
         controller.loggedIn();
     }
@@ -103,9 +112,9 @@ define(function() {
 
     HostApp.alertTitleWithMessage = function(title, message) {
         if (OS_TYPE == "mac") {
-            controller.alertTitle_withMessage_(message);
+            controller.alertTitle_withMessage_(title, message);
         } else {
-            controller.alertTitleWithMessage(message);
+            controller.alertTitleWithMessage(title, message);
         }
     }
 
diff --git a/WebKit/scripts/helper/Paths.js b/WebKit/scripts/helper/Paths.js
index ae4dab1..3b7cf71 100644
--- a/WebKit/scripts/helper/Paths.js
+++ b/WebKit/scripts/helper/Paths.js
@@ -101,7 +101,7 @@ function(jQuery, HostApp, Hmac, Cache) {
             data: data,
             processData: false,
             error: function(xhr, ajaxOptions, thrownError) {
-                console.error("postMultipart " + xhr.statusText + " (" + url + "): '" + xhr.responseText + "'");
+                console.error("postMultipart (" + xhr.status + ")" + xhr.statusText + " (" + url + "): '" + xhr.responseText + "'");
             }
         });
     }