Description:
------------
Originally I thought this was an Apache bug since php://input held duplicate POST data. https://issues.apache.org/bugzilla/show_bug.cgi?id=54218 - However, Perl correctly reads single values.

admin@summit:$uname -a
Linux summit 2.6.26-2-686-bigmem #1 SMP Sun Mar 4 23:05:22 UTC 2012 i686 GNU/Linux
admin@summit:$/usr/sbin/apache2 -v
Server version: Apache/2.2.16 (Debian)
Server built:   Sep  9 2012 21:17:33
admin@summit:$ /usr/bin/php5 -v
PHP 5.4.9-1~dotdeb.0 (cli) (built: Nov 26 2012 04:24:47)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies

Test script:
---------------
<?
if(!empty($_POST)) {
  header("Content-Type: text/plain");
  echo file_get_contents('php://input');
  echo "\n=========================================================\n";
  var_dump($_POST); exit;
}
?>
This duplicates:
<form method="post" target="_blank">
    <input type="text" name="menu" value="Blah" />
    <input type="submit" />
</form>
<p>This doesn't:</p>
<form method="post" target="_blank">
    <input type="text" name="menu" value="Blah" />
    <input type="text" name="second" value="Second value" />
    <input type="submit" />
</form>

Expected result:
----------------
Output (first button):
menu=Blah
=========================================================
array(1) {
  ["menu"]=>
  string(4) "Blah"
}
Output (second button):
menu=Blah&second=Second+value
=========================================================
array(2) {
  ["menu"]=>
  string(4) "Blah"
  ["second"]=>
  string(12) "Second value"
}

Actual result:
--------------
Output (first button):
menu=Blahmenu=Blah
=========================================================
array(1) {
  ["menu"]=>
  string(13) "Blahmenu=Blah"
}
Output (second button):
menu=Blah&second=Second+valuemenu=Blah&second=Second+value
=========================================================
array(2) {
  ["menu"]=>
  string(4) "Blah"
  ["second"]=>
  string(12) "Second value"
}