In "How do I get support for a Wrox book that Wiley did not purchase?", the link "http://www.wrox.com/misc-pages/booklist.shtml," includes the trailing comma, taking the user to a Wrox 404 page.
In the last question, "I would like to write for Wrox. Where do I start?", the link "http://www.wrox.com/misc-pages/writeforwrox.com.shtml" is invalid and takes the user to the browser default 404 page.