arikgub - 2:51 pm on Jun 11, 2011 (gmt 0)
And today, the "new" sites that re-appeared in the index few days ago, are gone again! See this too?
and in general, a very serious shake up in serps, and I am not talking about some crappy sites. Very well established sites moved +/- 10 positions overnight in the niche that has been pretty stable till now.