title: Weird issue with composer.phar
body: <p>I have composer.phar which was working great on my ubuntu server, then today when I try to use it I get nothing. When I run "php composer.phar" for example, I see no output at all (even with -v)</p>
  
  <p>I tried to download new composer.phar which did not solve the issue.</p>
  
  <p>My PHP:</p>
  
  <blockquote>
    <p>PHP 5.5.5-1+debphp.org~precise+2 (cli) (built: Oct 28 2013 12:57:03)
    Copyright (c) 1997-2013 The PHP Group Zend Engine v2.5.0, Copyright
    (c) 1998-2013 Zend Technologies
        with Zend OPcache v7.0.3-dev, Copyright (c) 1999-2013, by Zend Technologies</p>
  </blockquote>