Description:
------------
Function method_exists() is invoking __autoload(), which, in my opinion, 
is an unwanted behaviour. Sorry, if this has been posted already - tried 
to search for it without any results.

Reproduce code:
---------------
<?php // PHP file "my_class.php"
  class my_class{
    public $property = "I'm not a class name!";
  }
?>

<?php // PHP file #2
  function __autoload($class_name) {
    echo 'Loading: '.$class_name.'<br />';
    require_once $class_name.'.php';
  }
	
  $my_object = new my_class();
  method_exists($my_object-> property, 'method');
?>

Expected result:
----------------
Loading: my_class
Loading: I am not a class name!