cabbie - 2:03 pm on Mar 21, 2013 (gmt 0)
InternetHeaven, you have indeed had a lot of trouble with Adsense lately.
It all points to me that you have serious issues with invalid clicking.
There is another thread on the home page about a Chameleon Botnet.
These botnets aren't new.They have been around for at least 4 years and if your website is inadvertently caught up in it you are lucky Google is not banning your a/c.
You need to check your logs and referrers.Going by your report of losing most of your adsense revenue, its probably a main referrer for you. Look at the ad network on that site.I suspect that it wont be adsense. Be scrupulous and check if it's bonafide or part of a advertising bot net.