I tried moving categories with the category browser.
At first the move is effected correctly in the category tree and then...when I reload the category browser goes back to the old position.
Checking the category in the database menu and searching for subcategories of the top category where the category in question should have moved it appears to be in the list but the field "subcategory of" indicates the old state. The static and dynamic pages reflect the move correctly.
I am confused: has anybody tested this?