Session timeout results in a faulty dialog for 'Add Page' on the dashboard

• Open 2 tabs in Firefox that point to the same Confluence instance (qa-eac)
• Log out in one tab
• Click "Add Page" in the other tab

Instead of the dialog to add a page, you will see the login page inside the box for the dialog. This generates an error message in firebug:

data.spaceTemplates is undefined
[Break on this error] data.spaceTemplates.length...Group.show() : $spaceOptGroup.hide(); 

Screenshot is attached.