I dont know if anyone has already noticed but I think the Automatic 301 redirects of Platinum SEO Pack is not working.
Even if you try to change the permalink, someone that would be able to access your site from search engines would just end up on an Error 404 Page.
I tried to leave a comment on the Techblissonline.com but to my surprise, it was rejected and deleted. All the plugin owner can do was to accept positive comments.
Hope that the Permanent 301 Redirect function would be fixed on the next update