the hyperlink created by the projects-overview.xml is not the same as the link created by the navigation-aggegate.xml. The jelly code appears to be the same, but for some reason, the link generated by navigation.xml is "multiproject/<project>", while the link generated by projects-overview.xml is "/multiproject/<project". this second link will fail unless you have the project site setup at the root context. i personally host several maven projects sites on one box like this: http://localhost/maven/project1/site, http://localhost/maven/project2/site, so the generated links don't work with this setup.