NomadMan - 6:37 pm on Apr 8, 2012 (gmt 0)
With search now flavored with personalized local search and suggested search, Ads being straight off-mark seems to be recurring thing now.
I see traffic go up, with Adsense revenue spikes (relevant ads) mixed with days of total 'lights out'(ads offmark).
Just a thought;
With all the personalized & local search being pinned to a visitor (as a background) - it seems Adsense can't figure out what ads to display if background & website content do not match by far....