Edit this page: http://qa-eac.atlassian.com/confluence/pages/editpage.action?pageId=662110626 and try to edit Location, will get a JS error:

node has no properties
http://qa-eac.atlassian.com/confluence/s/1403/29/1.0/_/download/resources/confluence.web.resources:page-ordering-tree/tree.js
Line 91

This is because the back-end has not populated expandedNodes correctly for the page tree, you can also see this in the location path:

Location: Confluence Development > Home Done

It should be Confluence Development > Confluence Induction > Home > Analysis of bundling new tasklist