I am now seeing an uptick in complaints from Google AdSense publishers that their ads, their AdSense ad units, are not displaying on their site. This seems not as widespread as the issue back in September but I am getting complaint after complaint sent to me via email and there are dozens and dozens of complaints in the forums.
There is a large thread of complaints in the Google AdSense Help forums, but also many smaller threads in the same forum and one on WebmasterWorld. Google has not responded after days and days of complaints and I am not sure how widespread the issue.
Some publishers have seen their AdSense revenue drop 70% over this time period, while others aren't noticing any issues.
Are you having any issues around your AdSense ads not showing up? Are your earnings significantly down over the past few days?
Forum discussion at Google AdSense Help and WebmasterWorld.