I have a publishing site, and am trying to reorder the pages via the Site Navigation Settings pages (Site Settings -> Look and Feel -> Navigation.)
I move the pages up and down in the Navigation Editing and Sorting section, but when I click OK, none of the alterations are persisted.
Is there any reason why this might happen? I created the pages via a Powershell script, and originally used Gary Lapointe's gl-setnavigationnodes (link) to set the navigation order via a script.
UPDATE: Looking in the logs I see this related error:
Unable to retrieve QuickLaunch SPNavigationNodeCollection from Web at: http://server/sitecollection/web. The SPNavigation store is likely corrupt.
If I browse the SPWeb in question, I can see that web.Navigation.QuickLaunch is null, which must be part of the problem.