Welcome to WebmasterWorld Guest from 220.127.116.11
I figured out why earnings have dropped the last few days. We're set to text/image but have gotten about 1/4 the number of image ads we normally do. What would suddenly cause that?
Saw this 2 months ago. My impressions dropped. Thought it was just a bleep. Then noticed image ads on my site. I only allow text ads so thought it was strange. All seemed okay with my local files and Adsense settings until I viewed the source code of my homepage and found someone had hijacked my site and replaced my publisher ID with his. Not saying this is what's causing your problem. Just thought to share.
Weird, I'm also seing way low quality ads, even spamming ads "mass mail marketing", something is not right here.
[edited by: incrediBILL at 1:32 pm (utc) on May 9, 2012]