diff --git a/customize.dist/translations/messages.js b/customize.dist/translations/messages.js
index 96321aa3b..f554de85b 100644
--- a/customize.dist/translations/messages.js
+++ b/customize.dist/translations/messages.js
@@ -581,6 +581,7 @@ define(function () {
     out.upload_mustLogin = "You must be logged in to upload files";
     out.download_button = "Decrypt & Download";
     out.download_mt_button = "Download";
+    out.download_resourceNotAvailable = "The requested resource was not available...";
 
     out.todo_title = "CryptTodo";
     out.todo_newTodoNamePlaceholder = "Describe your task...";
diff --git a/www/common/boot2.js b/www/common/boot2.js
index ec3b3d7db..6d81e249c 100644
--- a/www/common/boot2.js
+++ b/www/common/boot2.js
@@ -21,6 +21,19 @@ define([
         };
     }
 
+    // RPC breaks if you don't support Number.MAX_SAFE_INTEGER
+    if (Number && !Number.MAX_SAFE_INTEGER) {
+        Number.MAX_SAFE_INTEGER = 9007199254740991;
+    }
+
+    if (typeof(window.Symbol) !== 'function') {
+        var idCounter = 0;
+        var Symbol = window.Symbol = function Symbol(key) {
+            return '__' + key + '_' + Math.floor(Math.random() * 1e9) + '_' + (++idCounter) + '__';
+        };
+        Symbol.iterator = Symbol('Symbol.iterator');
+    }
+
     var failStore = function () {
         console.error(new Error('wut'));
         require(['jquery'], function ($) {
diff --git a/www/common/sframe-boot2.js b/www/common/sframe-boot2.js
index fe614ba33..697f22a91 100644
--- a/www/common/sframe-boot2.js
+++ b/www/common/sframe-boot2.js
@@ -18,6 +18,14 @@ define([
         Number.MAX_SAFE_INTEGER = 9007199254740991;
     }
 
+    if (typeof(window.Symbol) !== 'function') {
+        var idCounter = 0;
+        var Symbol = window.Symbol = function Symbol(key) {
+            return '__' + key + '_' + Math.floor(Math.random() * 1e9) + '_' + (++idCounter) + '__';
+        };
+        Symbol.iterator = Symbol('Symbol.iterator');
+    }
+
     var mkFakeStore = function () {
         var fakeStorage = {
             getItem: function (k) { return fakeStorage[k]; },
diff --git a/www/file/inner.js b/www/file/inner.js
index 30e742528..2dbe765ce 100644
--- a/www/file/inner.js
+++ b/www/file/inner.js
@@ -91,7 +91,12 @@ define([
             var key = Nacl.util.decodeBase64(cryptKey);
 
             FileCrypto.fetchDecryptedMetadata(src, key, function (e, metadata) {
-                if (e) { return void console.error(e); }
+                if (e) {
+                    if (e === 'XHR_ERROR') {
+                        return void UI.errorLoadingScreen(Messages.download_resourceNotAvailable);
+                    }
+                    return void console.error(e);
+                }
                 var title = document.title = metadata.name;
                 Title.updateTitle(title || Title.defaultTitle);
                 toolbar.addElement(['pageTitle'], {pageTitle: title});
@@ -238,10 +243,9 @@ define([
         }
 
         // we're in upload mode
-
         if (!common.isLoggedIn()) {
+            UI.removeLoadingScreen();
             return UI.alert(Messages.upload_mustLogin, function () {
-                UI.errorLoadingScreen(Messages.upload_mustLogin);
                 common.setLoginRedirect(function () {
                     common.gotoURL('/login/');
                 });