As it often happens, while the past weekend days were very good for some of us, the past 5 days were horrible for me. After about 120 days with earnings predictable with an error near to 2% on a daily basis, earnings are down about 40%. Above all there is a big drop in EPC. Unfortunately, this is not the result of usual AdSense fluctuations. It looks like the major advertisers removed themselves from the "content network advertising". I did a lot of research and one of them (the most important) seems to appear only on standard google search results (it is interesting to see that it doesn't appear in the results of the AdLinks (I thought they would access the search advertisers, but it loks like this is not true)). Another big player no longer appears on the content network and I was unable to see it on the search one too. In july, a third big player stopped advertising with AdSense. All of them are really big players (quoted on the NYSE) and I carefully checked to see whether they "banned" my web site, but this seems not to be true.