How could the price estimate for my house drop 10% in 10 days??The Zillow estimate for my house as of 6/3/11 was $871,500. Today it is $784,500. All historical Zillow-estimate data for this property (160 Mount Lassen Drive, San Rafael CA 94903) also appear to have been retroactively adjusted as of today. Previously the Zillow estimate never went below $810,000. Today the low point is shown as $744,000 as of last March. What is happening?June 13 2011 - Lucas Valley-Marinwood00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.