Just switched over my site that has been up for a year over to a dynamic web site. My home page...www.xxx.com has maintained the previous page rank. I have a button on the site to go to the home page which now becomes www.xxx.com/index.php?page=home. Will the search engines see this as duplicate content and penalize the site? The new index.php site has a page rank of 0 which I assume would be normal for a new page.