When I select 'Customize Dashboard' and drag another block into the Dashboard, it takes its position, becomes wider, but then nothing.
While it is supposed to fold out and become a block, they don't do anything in my install. No JS errors get thrown, so that's not the problem it seems. To me it seems AJAX never gets called.
Even 'Add custom box' does not work.
Upon saving, nothing gets placed and I'm stuck with the same dashboard as before. Can anyone figure out what's happening?