Hello,
I went to http://validator.w3.org and I tried to validate my index.php file, but it gives me the following message:
Sorry, I am unable to validate this document because its content type is application/x-php, which is not currently supported by this service.
The Content-Type header is sent by your web server (or web browser if you use the file upload interface) and depends on its configuration. Commonly, web servers will have a mapping of filename extensions (such as ".html") to MIME Content-Type values (such as text/html).
I don't have a clue why this is so. I believe it is not good if your site is not validated...
Any suggestions will be much appreciated.