google made another wierd and i would say that rather crazy changing.many of us webmasters including me are using ads in iframes in some places.google recently about 24 before made a changing.and now anyone who is displaying ads in iframe.it is not showing and loading a blank page. did anyone else noticed it???
well google is adaptive. no matter how many tricks we give, google will always adapt to it. that is why it is number one. who does not adapt to the situation, goes out of the situation