Save a tad of bandwidth by removing the HTML comment from overall_footer.tpl
Cache the subBlack.css file by renaming the file subBlackCSS.php and adding the code below to the top of the file. That way it caches the CSS on the client machine for 1h (60 * 60) before getting it again. I do the same with the JS files. Remember to alter the overall_header.tpl & simple_header.tpl to point to the new files. It will also GZIP the CSS file to the client which makes it way smaller.
Code:
<?php
ob_start ("ob_gzhandler");
header("Content-type: text/css; charset: ISO-8859-1");
header("Cache-Control: must-revalidate");
$offset = 60 * 60 ;
$ExpStr = "Expires: " .
gmdate("D, d M Y H:i:s",
time() + $offset) . " GMT";
header($ExpStr);
?>
What version of PHP & MySQL do you run the forums on?
If you have control over the php.ini files it may be an idea to install
eAccelerator as it caches the php code and makes it much much faster. Also look at
eXtreme Styles mod as it caches all the phpBB templates and makes it faster still.