I run a general blog and I noticed something strange recently. The blog contains only one Adsense block, blended into one of the posts, generally the first or the second or whichever I think will be read most. What happens (or seems to happen?) since a few weeks is that the ads shown tend to be fitting to the context of the post they appear in. So if for instance it's placed in an article about travelling, the ads are mostly travel oriented. But when I move the block to another post (WITHIN THE SAME PAGE) about, say, magazines, most of the ads promote magazines! This is puzzling me because, if this is generally true, you can easily imagine what SEO-consequences this might have... Anyone else noticed the same, or is this just happening by chance?