onehotspots10 - 2:32 am on Jul 3, 2013 (gmt 0)
Please kindly take a look at the some threads over at google product forum:
And media coverage:
There are a number of publishers including myself that are experience 90% ctr drop in text ads only for nearly a week.
Please kindly go through the first link in this message, there are a number of screenshots showing the overnight drop in ctr on text ads.
This issue is not due "nessie", in fact, clicks are registered then disappeared in a very weird fashion.
I hope the above is sufficient for you to take a look and bring this to your tech team. Let me know if you need anything from us