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What the heck is going on? Is Google losing advertisers to Yahoo and other competititors or what?
Mind you, the home page is a summary of my site, whereas the child pages are content specific, and all run the same leaderboard ad type.
Perhaps G are tightening up the targetting of content based ads?
Although I am glad it doesn't happen just to me, I hope I get my 4 links back on 250x250 ads.