http://www.adsensedecorator.com/adsense-banner-sizes/
How Google Adsense ads to different site and not have 3 with the same publicity?
I have a blog with 3 banners and most of the time they show the same ad, they are different sizes, but still showing the same ad, and I think it's a pain. Is there a way to ensure they are all different and not even on the printed page? No thank you, this is not the same code. They are different banners different codes
Some people still waste time with this "Google Adsense" fiasco? BTW that hosts your blog? … They have control over the ads
Optimisation Essentials: Bigger is better