Description:
------------
$_POST gets shrunk to 1 element

Reproduce code:
---------------
<form method="post" enctype="multipart/form-data">
<input type="text" name="test[]" value="1" />
<input type="text" name="test[]" value="2" />
<input type="text" name="test[]" value="3" />
<input type="submit" />
</form>
<?php
print_r($_POST);
?>

Expected result:
----------------
5.3.0 and 5.2.11 print

Array ( [test] => Array ( [0] => 1 [1] => 2 [2] => 3 ) )

Actual result:
--------------
Array ( [test] => Array ( [0] => 3 ) )