Lame_Wolf - 7:39 pm on Apr 3, 2012 (gmt 0)
I've had that twice, recently. Both were for the same (deep-linked) page. No adverts on that page either.
Just got a message on Webmaster Tools about another of my sites having a 'significant decrease in traffic',
Something is seriously wrong, but I cannot put my finger on why. (Apart from the totally off-topic adverts.)