Description:
------------
- Using the VC9 x86 Non Thread Safe 5.3.1 version and the 5.3.2RC1 version from windows.php.net
- IIS7 using fast cgi
- Script works when under C:\inetpub\wwwroot
- Script gives warning when it is running under a virtual directory or application
- Problem does not exist when open_basedir is not set
- Following are some php.ini settings from development ini file
  - cgi.force_redirect = 0
  - cgi.fix_pathinfo = 1
  - fastcgi.impersonate = 1
  - fastcgi.logging = 0

Reproduce code:
---------------
<?php
$root = dirname(__FILE__);
echo $root;
echo 'phpinfo.php: ' . file_exists('test.php') . '<br>';
echo 'junk.php: ' . file_exists('junk.php') . '<br><br>';

echo 'phpinfo.php: ' . file_exists("$root/test.php") . '<br>';
echo 'junk.php: ' . file_exists("$root/junk.php") . '<br><br>';
?>

Expected result:
----------------
C:\Users\myname\WIP\myproject

test.php: 1
junk.php:

test.php: 1
junk.php:

Actual result:
--------------
C:\Users\myname\WIP\myproject

test.php: 1

Warning: file_exists() [function.file-exists.php]: open_basedir restriction in effect. File(junk.php) is not within the allowed path(s): (C:\inetpub\wwwroot;C:\Users\myname\WIP) in C:\Users\myname\WIP\myproject\test.php on line 5
junk.php:

test.php: 1

Warning: file_exists() [function.file-exists.php]: open_basedir restriction in effect. File(C:\Users\myname\WIP\myproject/junk.php) is not within the allowed path(s): (C:\inetpub\wwwroot;C:\Users\myname\WIP) in C:\Users\myname\WIP\myproject\test.php on line 8
junk.php: