While reading the latest version of the getting started document, I noticed some broken links to the main documentation.
Here are a few:
requiredstring validator http://struts.apache.org/docs/requiredstring-validator.html
email validator http://struts.apache.org/docs/email-validator.html
fieldexpression validator http://struts.apache.org/docs/fieldexpression-validator.html
Themes and Templates Documentation http://struts.apache.org/docs/themes-and-templates.html
Ajax Theme in the documentation http://struts.apache.org/docs/ajax-theme.html
Selecting Themes http://struts.apache.org/docs/selecting-themes.html
Mainly all links to the detailed documentation seems broken. I guess that it is just a path issue.