title: Intellisense in IntelliJ no longer working
body: <p>I'm currently running IntelliJ IDEA 13.1. While running IntelliJ 13 intellisense/autocomplete stopped working. I tried upgrading and it still doesn't work.</p>
  
  <p>I can explicitly invoke code completion using <code>ctrl+space</code>. I looked in <em>Settings->Editor->Code Completion</em> and nothing looks out of place. Is there somewhere else that turns this feature on/off?</p>