explorador - 3:18 am on Aug 1, 2013 (gmt 0)
Oh yes it sucks, welcome to the club of "trying-to-understand-Adsense", take a look around, this has been happening to many users and now some more.
I've been having low numbers and this week... even more. I'm confused because just finished a big migration of two strong sites, well one that is the most specially productive, but after having recovered from low lows, I reached 50%...... and just this week 25% as you say.
It sucks not being able of figuring what affects what