Is it time to get rid of the extra “www.” for your websites? Of course, you need to support users putting in www.foobar.com or foobar.com, but should you just let it work, or should you redirect over to foobar.com (slashdot.org seemed to do this on day one, and it was the first time that I noticed it).
I have been doing this for many years with many of my sites:
<VirtualHost *:80> ServerName www.foobar.com Redirect permanent / http://foobar.com/ </VirtualHost>
Can this help with search-engines and duplicate content? Is it just a cleaner look?
I prefer it, and wish that my browsers that take “foo” to “http://www.foo.com” would first try just foo.com.