W3C Link Checker find some broken links on wordpress blog:
List of broken links and other issues
There are issues with the URLs listed below. The table summarizes the issues and suggested actions by HTTP response status code.
Code Occurrences What to do
(N/A) 2 The link was not checked due to robots exclusion rules. Check the link manually, and see also the link checker documentation on robots exclusion.
404 1 The link is broken. Double-check that you have not made any typo, or mistake in copy-pasting. If the link points to a resource that no longer exists, you may want to remove or fix the link.
501 1 Could not check this link: method not implemented or scheme not supported.