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However, if you've been getting new backlinks, Google DOES register them continually and use them in calculating your real PR and your rankings on various searches. It's just that the information isn't exposed publicly with the link: operator or through toolbar PR. And the link: operator will never show you anything more than a sampling of the backlinks that they actually see, and that sampling is usually the less important ones, in my experience.
another query , i changed meta tags and my main keyword to adjust to my links, im trying to rank for my theme. when will the new keyword rank for me , even if its like no 67?