Description:
------------
Provided is the source for 3 files: bug0.html submits a form to bug1.html, which then stores the post'd data in a session.  A form in bug1.html submits to bug2.html (with no post variables), but the session data is blank where it should have contained the post data from bug0.html (this is more clear if you read the source code).  If the session is inspected in bug1.html, it is as expected, however the file written to /tmp/ is not.

The weird thing is this: there is a style tag in bug1.html which contains a line "@import url()".  This is outside the PHP, and shouldn't affect anything to do with the PHP parsing / running.  If the @import line is removed, the session data gets written properly.

If a better explanation / demo is needed, please feel free to ask.


Reproduce code:
---------------
bug0.html:

<form method="post" action="bug1.html">
      <input name="info" type="hidden" value="baa baa black sheep" />
      <input type="submit" value="  OK  " />
</form>

bug1.html:

<?php
	session_start();
?>

<style>
 @import url();
</style>

<?php
	$_SESSION['blah1'] = $_POST['info'];
	$_SESSION['blah2'] = "Look at this: ".$_POST['info'];
	echo "<pre>";print_r($_SESSION);echo "</pre>";
?>
	<form method="post" action="bug2.html">
		<input type="submit" value="   OK   " />
	</form>

bug2.html:

<?php
    session_start();
    echo "<pre>";print_r($_SESSION);exit;
?>


Expected result:
----------------
In bug1.html:

Array
(
    [blah1] => baa baa black sheep
    [blah2] => Look at this: baa baa black sheep
)

In bug2.html:

Array
(
    [blah1] => baa baa black sheep
    [blah2] => Look at this: baa baa black sheep
)


Actual result:
--------------
In bug1.html:

Array
(
    [blah1] => baa baa black sheep
    [blah2] => Look at this: baa baa black sheep
)

In bug2.html:

Array
(
    [blah1] => 
    [blah2] => Look at this: 
)