LargeDiagram.vm contains a reference to "pages/pageinfo.action" which doesn't exist:
#if ($viewingPageInfo) > <a href="$req.contextPath/pages/pageinfo.action?pageId=$helper.page.id">Information</a>
It should probably reference to "pages/viewinfo.action".
The related issue is:
http://jira.atlassian.com/browse/CONF-10393
It looks like you already fixed this with your recent re-factoring. Can you confirm?
thx!
-chris