gistfile1.txt

diff --git a/media/js/zamboni/buttons.js b/media/js/zamboni/buttons.js
index e8dd77b..4434d7b 100644
--- a/media/js/zamboni/buttons.js
+++ b/media/js/zamboni/buttons.js
@@ -33,7 +33,8 @@ var webappButton = function() {
             .click(function(e) {
                 e.preventDefault();
                 purchases.record($this, function(receipt) {
-                  purchases.install_app(manifestURL, receipt);
+                  console.log($this);
+                  purchases.install_app(manifestURL, receipt, $this);
                 });
             });
     }

diff --git a/media/js/zamboni/apps.js b/media/js/zamboni/apps.js
index 00bfaf6..8b18137 100644
--- a/media/js/zamboni/apps.js
+++ b/media/js/zamboni/apps.js
...
+exports._showError = function(errSummary, errMessage, opt, element) {
+    if (element) {
+        var $popup = $('.apps-error-msg:first');
+        $popup.html(errMessage);
+        $popup.removeClass('modal');
+        $popup.removeClass('hidden');
+        $popup('p.install-button a', {pointTo: 'p.install-button a'});
+        $popup.trigger('click');
+    } else {