I don't know. It works for 100 other people even with vBSEO. It must be something with your installation. All those plugins you listed just modify the variable, there is no reason this will break anything.
I had a look at
http://www.psicofxp.com/ and that site is heavily customized.
If you want me to have a look I need some sort of access.
You can also wrap the plugin in a userid test (so it only is enable for yourself) and print_r on all variables to find out what's going wrong. This requires PHP knowledge tho, but that's what I'd do.
1.
Change the "Template Cache" plugin to:
Code:
if ($vbulletin->userinfo['userid'] == 1)
if ($vbulletin->options['pbtc_enable'])
{
cache_templates_with_file_cache($globaltemplates, $style['templatelist']);
$globaltemplates = array();
}}
Upload the attached file instead of the one you can download up here.
Go to your forum home, and a lot of text will appear on top of the page (and probably errors, too). Post me the whole output (please view the source code and past it in [code]).
Also, are the 6578sdas7687sd86asd.php files empty or the 2132.php ones?