Is it Google changeing the way they Rank sites?
 

Finally, I noticed in Google grab/index/SERP of made me feel Google, it changed "formula" is once again beautiful many changes.

My site just walked from protease PR0, I didn't do any major change.
Another proof is in the webmaster/diagnosis/grab statistics, they are not shown
Google distribution in your web PageRank
No use data. Please check back later.
Your web PageRank highest <-they are now more than three days, so... I still don't know what happened... How should we do get under the top?

Yes Google displaying the sites where the content is recently updated.