Description:
------------
Upgrading to 5.2.1 (even the last CVS) caused the malfuncion of several applications. We noticed the crash of apparently every script handling POST data.
The configuration in use was php-5.2.1 + FastCGI + Apache 1.3.37, downgrading back to 5.2.0 resolved the problem.

Reproduce code:
---------------
test.html:

<form enctype="multipart/form-data" action="test.php" method="post">
<input type="hidden" name="MAX_FILE_SIZE" value="10000000">
Send this file: <input name="userfile" type="file">
<input type="submit" value="Send File">
</form>

test.php

<?php
echo "Hello"
?>

Actual result:
--------------
Internal server error