I have a vietseoguy dot com with a subdomain "cuocthiseo". If you type "cuocthiseo" in Google.com NOW, you'll see my site ranks 8. Please notice that my site doesn't have a Cache, only Similar Pages! And this only occurs when this site goes TOP 10. And this site only goes TOP 10 only when I publish or modify a (new) entry. This has been happening for 1 month up to now. And this subdomain was created in Mid December 2008. And I DON't use "noarchive"! Anyone could guess the reasons? Thank you! One more clue: this site only ranks ~6-8 within 24 hours. 22 hours left!