There’s a great little Google tool that doesn’t actually work…
In order to avoid penalties for duplicate content (even though you have only one copy of each post) Google will see http://caspianit.co.uk and http://www.caspianit.co.uk as two completely separate domains.
To get round the problem, simply goto Google webmaster tools and select:
Dashboard > Yourwebsitename.com > Site Configuration > Settings. From there goto the ‘Preferred domain settings’
This should work for you, but as you can see for me I get this error (the logic goes something like this)
Error! We need to verify our domain! We can’t verify your domain because it’s already been verified – we therefore can not initiate the verification initiation process! Error! Logic error… pzittt. fzzzz… Error. we need to verify… I’m sorry Dave I’m afraid I can’t do that… cannot verify… pziiit – BOOM!
Ah the good ol’ process of logic.