Description:
------------
[tested with php 4.1.2 only because my providers disabled virtual() on their 4.3.4 version]

It seems that when using both ob_start() and virtual() does not work. Contents of the virtual-ly included file is not parsed through the ob_start() handler function.
Even worse : handler of ob_start() is no more used after the call of virtual().





Reproduce code:
---------------
===
<?php
function f($buffer)
{
  return (str_replace('1', '2', $buffer));
}

ob_start('f');
 ?>
111
<?php
virtual('afile.html');
?>
111
===

afile.html :
===
111
===


Expected result:
----------------
222
222
222


Actual result:
--------------
222
111
111