diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..2eebfde
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1 @@
+By submitting code to this project, you agree to irrevocably release it under the same license as this project. See README.md for more details.
\ No newline at end of file
diff --git a/controllers/controllers.php b/controllers/controllers.php
index 0dfa086..fc84960 100644
--- a/controllers/controllers.php
+++ b/controllers/controllers.php
@@ -2,12 +2,10 @@
 
 $app->get('/', function() use($app) {
   $res = $app->response();
-  ob_start();
-  render('index', array(
+  $html = render('index', array(
     'title'        => 'Switchboard',
     'meta'         => ''
   ));
-  $html = ob_get_clean();
   $res->body($html);
 });
 
@@ -20,14 +18,12 @@ $app->get('/subscription/:hash', function($hash) use($app) {
   if(!$subscription) {
     $app->response()->status(404);
   } else {
-    ob_start();
-    render('subscription-status', array(
+    $html = render('subscription-status', array(
       'title'        => 'Switchboard',
       'meta'         => '',
       'subscription' => $subscription,
       'feed'         => $feed
     ));
-    $html = ob_get_clean();
     $res->body($html);
   }
 });
@@ -42,15 +38,13 @@ $app->get('/feed/:hash', function($hash) use($app) {
   if(!$feed) {
     $app->response()->status(404);
   } else {
-    ob_start();
-    render('feed-status', array(
+    $html = render('feed-status', array(
       'title'        => 'Switchboard',
       'meta'         => '',
       'feed'         => $feed,
       'subscribers'  => $subscribers,
       'num_subscribers' => $num_subscribers
     ));
-    $html = ob_get_clean();
     $res->body($html);
   }
 });
diff --git a/controllers/push.php b/controllers/push.php
index 4668c4f..d8eb21c 100644
--- a/controllers/push.php
+++ b/controllers/push.php
@@ -49,7 +49,7 @@ $app->post('/', function() use($app) {
       $callback = k($params, 'hub_callback');
 
       if(!is_valid_push_url($topic)) {
-        push_error($app, 'Topic URL was invalid');
+        push_error($app, 'Topic URL was invalid ('.$topic.')');
       }
 
       if(!is_valid_push_url($callback)) {
@@ -102,6 +102,12 @@ $app->post('/', function() use($app) {
 
       // Sanity check the request params
       $url = k($params, 'hub_url');
+      if(!$url)
+        $url = k($params, 'hub_topic');
+
+      if(!$url) {
+        push_error($app, 'No URL was specified. When publishing, send the topic URL in a parameter named hub.topic');
+      }
 
       if(!is_valid_push_url($url)) {
         push_error($app, 'URL was invalid');
diff --git a/lib/helpers.php b/lib/helpers.php
index 439d1ed..64ab074 100644
--- a/lib/helpers.php
+++ b/lib/helpers.php
@@ -97,7 +97,9 @@ function is_valid_push_url($url) {
 
 function render($page, $data) {
   global $app;
-  return $app->render('layout.php', array_merge($data, array('page' => $page)));
+  ob_start();
+  $app->render('layout.php', array_merge($data, array('page' => $page)));
+  return ob_get_clean();
 };
 
 function partial($template, $data=array(), $debug=false) {
diff --git a/scripts/run.php b/scripts/run.php
index 5d30182..4a92a0c 100644
--- a/scripts/run.php
+++ b/scripts/run.php
@@ -1,7 +1,7 @@
 <?php
 declare(ticks=1);
 
-chdir('..');
+chdir(__DIR__.'/..');
 
 $mode = 'run';
 if(array_key_exists(1, $argv) && $argv[1] == 'once')