I have website, when i open my webpage without www. it shows me my older one cached page. and with www. new page. Why? http://dom-casino.com http://www.dom-casino.com for both cached page are different, Why? Thanks for input in advance.
It looks the same to me. You should also consider a permanent redirect from dom-casino (dot) com to www (dot) dom-casino (dot) com or vice versa.
It's because of http://dom-casino.com and http://www.dom-casino.com are different urls in the eyes of Google.