Description:
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I have both the register globals and track vars options turned on and verified both through phpinfo() output.

Global GET or apache environment variables are not accessable, except through the $_SERVER or $_GET arrays.  POST variables might also be inaccessable, but I have not tested them.

Backing down from 4.3.3RC1 to 4.3.2, without any configuration changes what-so-ever, resolved the issue.

Reproduce code:
---------------
<?
echo $_SERVER['HTTP_USER_AGENT'];

echo $REQUEST_URI;
?>


Expected result:
----------------
The first echo statement should echo the user agent string and the second echo statement should echo the URI requested by the browser.



Actual result:
--------------
The first echo statement echos the user agent string.  The second echo statement echos nothing.