Redirect stopped working in 3.5

[sv1cec]

I was using the following code to show a message and then redirect the user to a predefined page:

PHP Code:

$url="showthread.php?p={$post}";
eval('$warn_page .= "' . fetch_template('warn_redirect') . '";'); 


The warn redirect template started with:

<META HTTP-EQUIV="REFRESH" CONTENT="1; URL={$url}">

<table class="tborder" cellpadding="6" cellspacing="1" border="0" width="100%" align="center">
<thead>
    <tr>
        <td class="tcat">

etc.
etc.

In vB 3.5 this method of redirection, stopped working. The page created by the template loads fine, but the META instruction is not included. The $url parameter is passed fine, I use it further down and it is there, it's just that the META part is not included.

Any ideas will be sincerely appreciated.