Description:
------------
In PHP 5.2.x there are not serialized any public/protected/private properies of ArrayObject descendants.



Reproduce code:
---------------
class Test extends ArrayObject
{
	public $var;
}

$test = new Test;
$test->var = 'hello';
$dolly = unserialize(serialize($test));
echo $dolly->var;

Expected result:
----------------
-> hello

Actual result:
--------------
none