cmon this is outrageous! i got 12 clicks from adsense yesterday for 11 cents! what the heck is going on. and yes they were all valid clicks! and to all of those who are going to say "stop spending time checking adsense and you will make more money, and wont have to worry about it" save ur time, i know! but seriously 12 clicks for 11 cents? cmon and my niche is like software and web deisgn so i know thats not to problem!
It means, if you talk about photography, and somebody clicks an ad about digital cameras, you get smart priced on that click because your sites not about that. Source: Pierce from the forums.
Either chalk it up to bad luck, get more traffic to compensate, or switch advertisers. Really the only thing you can do!
This is one of the things I dislike about adsense sometimes you may get quite a bit of clicks but you will not make very much money.