Please follow the below steps:
1. Replace the head of your document with the code below. ATT: This icnludes the latest changes made to correct the SEF issues with the previous RC release. Replace all of the top code in your index.php code down to the tag with the following:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="<?php echo $this->language; ?>" lang="<?php echo $this->language; ?>" dir="<?php echo $this->direction; ?>" >
<head>
<jdoc:include type="head" />
<link rel="stylesheet" href="/<?php echo $this->baseurl ?>/templates/<?php echo $this->template ?>/css/template.css" type="text/css" />
</head>
2. Replace all php codes relating to modules.
This is an example of an old code <?php mosLoadModules ( 'header', -3 ); ?>
Replace with this <jdoc:include type="modules" name="header" style="xhtml" />
3. Replace the mainbody code from <?php mosMainBody(); ?> to <jdoc:include type="component" style="xhtml" />
4. Rename the template_css.css file in your /css folder to template.css
