This Blog redirecting to other sites

I've been noticing that my blog is redirecting to other sites... ad sites. I'm not sure if it's only been happening to me, or if it's been happening to others who visit this blog. Could anyone inform me? It's just as annoying as when the paidtoclick ads were doing it, and I've resorted to the same tactic - pressing Esc to stop the page redirecting/loading. But, this is no way for a blog to run.