Google often index my site twice with exactly the same content. for example, google index www.mysite.com/somepage.aspx first, and later inidex mysite.com/somepage.aspx again. Those two are actually exactly the same page. I don't know how can it be, but how can I ask google NOT to index pages with www. in it???
Ja, right, but I have no idea what is mod rewrite. I am an ASP.NET man, I never use Apache... I don't know how to do mod rewrite, I never don't know what mod rewrite means....