The book was created in 5 copies, all identical in the book namespace listing. I deleted 3 of them.
I decided to look at the vault_list table to see what might be going on.
Every article appears 5 times with identical repeated records.
Rebuilding the namespaces seems to have no effect.
The namespace manager is also behaving strangely. i.e. If I click on the button to update namespace functions I get a message "The Default namespace function has not been set has not been assigned to a namespace."
Is there documentation on how the new functions are supposed to work? I don't see handles for special namespaces other than Default, Category and Image. Shouldn't there be special handling for Book and Template also?