levo - 5:10 pm on Jul 2, 2013 (gmt 0)
So I took out the code and restored the old. No ads show up!
Probably noting to do with new/old code. I think Google just ratelimited your IP.
The old code stops page rendering, inserts an iframe and than continues, while the new code finds the ad unit and inserts the almost very same iframe - without stopping.