If you go into a newsitem, the links at the top are incorrect. I believe this is probably because the links are relative, and going into a newsitem adds the newsitem's URL to the base URL for those links.
http://www.desktopdungeons.net/you-guys ... -generous/
Broken links: About, Free, Buy, Play. News is also broken, but it just takes you to the same page so you don't see a 404.