BedSupperclub - 1:38 am on Sep 1, 2013 (gmt 0)
You may have been hit by Adsense new valuation algo, it 's been implemented in waves from what I read in forums. Some have been hit early June, others end of June/early July.
I've been hit end of June.
And now another account I'm managing (different company) has been hit on August 29.