The HTML links are not being rendered for some of the pages. The log in page as the following:

<a href="signup">Create an account</a> if you are not a member yet.

Looking at the HTML source code, I see the following:

<a href="signup">Create an account</a> if you are not a member yet.

Another page is one of the build pages. The Starter by user link is broken:

Started by user <a href="/hudson/user/jsmith">jsmith</a>

I am not sure about other pages...