title: syntastic not functioning: no errors
body: <p>I've installed Pathogen, git clone'd the syntastic repo, and tried :Helptags in mvim. However, whenever I type :Helptags, I don't get an error but nothing at all happens. Any idea what might be going on?</p>
  
  <p>UPDATE: I've tried again with Vundle (which is working fine with NERDTree and powerline) and am getting the following errors:</p>
  
  <p><a href="https://i.stack.imgur.com/OAhzZ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OAhzZ.jpg" alt="a busy cat"></a>
  </p>