makin - 6:38 pm on Nov 19, 2012 (gmt 0)
I also have been affected by this update. Is the first time that an update drop traffic of my website.
Since friday my traffic starts dropping 25%. I lost almost all my long tails without link building.
And my keywords drop down at saturday night, between 2am and 3am GMT +1.
Google is penalizing the fair people because of sinners