Been an adsense user for a few years now , but lately i've been having some strange relevancy with the ads. I've recently launched 5 new sites and on each site the ads on the homepage are completely irrelevant to the sites subject and content. Its only a problem on the homepages though as other pages on the sites display perfectly targetted ads with high relevancy to the theme of the site. Is it just a case of waiting a few weeks more for the adsense spiders to properly categorise the content?