[Bouncer222]

You don't only have one back link , you have more than one.. and I think they are hidden which = bad for good to have hidden links.

$footer_link = 'Search Engine Friendly Tags by <a href="http://seoforums.org" title="SEO Forum" target="_blank">SEO Forum</a> .org';
break;
case 'forumdisplay':
$footer_link = 'Search Engine Friendly Tags by <a href="http://seoforums.org/seo-tools/" title="SEO Tools" target="_blank">SEO Tools</a>';
break;
case 'showthread':
$footer_link = 'Search Engine Friendly Tags by <a href="http://seoforums.org/seo-blog/" title="SEO Blog" target="_blank">SEO Blog</a>';
break;
}
$vbulletin->options['copyrighttext'] .= $footer_link;

Why do you have so much backlinks?

Uninstalled.