Don't try to load notes from a file if it doesn't exist.

application/modules/bulletin/models/RepositoryModel.php

@@ -64,10 +64,13 @@ class Bulletin_RepositoryModel
     public function getFileNotes($path, $branch = 'master')
     {
         $object = $note = '';
+        $filepath = $this->_repoPath . '/' . $path;
 
         $this->_checkout($branch);
-        $this->_git_exec('hash-object ' . escapeshellarg($this->_repoPath . '/' . $path), $object);
+        if(file_exists($filepath)){
+            $this->_git_exec('hash-object ' . escapeshellarg($filepath), $object);
             $this->_git_exec('notes --ref=creq show ' .  escapeshellarg($object), $note);
+        }
         $this->_checkout('master');
 
         return $note;