title: How to enable formatted Xdebug errors and traces
body: <p>I am not sure when or what I have changed, but suddenly xdebug no longer renders its formatted stacktraces. Instead, it renders the stacktrtace without any HTML; <a href="http://berkes.openphoto.me/photo/l/view" rel="noreferrer">here is an example</a>; Whereas I would expect the orange tables like <a href="http://xdebug.org/docs/stack_trace" rel="noreferrer">here</a></p>
  
  <p>I have searched the documentation, but cannot find any reference to a setting or config that would (un)set this. What did I do wrong?</p>
  
  <p>My xdebug.ini (Ubuntu, so /etc/php5/conf.d/xdebug.ini) is small:</p>
  
  <pre><code>zend_extension=/usr/lib/php5/20090626+lfs/xdebug.so
  
  xdebug.default_enable = 1
  xdebug.auto_trace = 1
  
  xdebug.remote_enable = 1
  xdebug.remote_port = 9010
  xdebug.remote_host = audrey
  
  ; xdebug.profiler_enable = 1
  
  ; Markup of var_dump
  xdebug.overload_var_dump = 1
  </code></pre>