I am not sure what happened exactly, but one of the links I had to Blogmad sent visitors directly to a domain name registration/renewal page. I get the same page when I follow my bookmark for Blogmad. I assume either Blogmad is dead or did not renew the registration of their domain. I have not had time to look into this too deeply but I believe I have fixed the problem by removing the Blogmad links in my side bar.
If any readers do have some idea of what happened to Blogmad please leave a comment.