Header Problems

ok ; so i've installed orca and set up forum categories. I refresh the page and I can see the categories just fine, Only problem is that they're half way down the page because they're pushed down by lots of codes. the header/navigation bar is gone. the codes arent any error messages, its basically the links and stuff that should be in the navigation bar. I opened orca's error_log file and see this:

[13-Mar-2009 20:57:53] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/*/public_html/orca/inc/util.inc.php:9) in /home/*/public_html/orca/inc/util.inc.php on line 61

line 9 is fine, and line 61 is this:

echo '<' . '?xml version="1.0" encoding="UTF-8"?' . '>';

i've tweaked it but to no avail. anyone know what I should do?

I have the same problem and this is ony shows in Firefox:

here is the beginig of the code

<div id="FloatDesc" style="position:absolute;display:none;z-index:100;"></div> <div id="login_div" class="login_ajax" onclick="var t = ( event.target || event.srcElement ); if

Please if anyone finds out post here

I found on other forum that the server will need ot have

xsl

Did not test yet but willtry

where exactly would you configure that? i assume the host, but where in the cpanel?