Absolutely every link? Or any in particular? If the former then I doubt it's anything we've done or a whole lot more people would complain than you. If it's just one small area then I suppose we could have some sort of overlap from an ad, but you'd have to say where the problem is for me to have any chance of starting on that. Does the page show an Amazon ad at the time or is it all pages? ie. if you refresh until there is no Amazon ad, does the problem go away?