Most likely the message format has changed. At the moment, the message handled in handle_call of leveled_bookie could very well be the atom destroy.
https://github.com/martinsumner/leveled/blob/da06ef133c1d73255434b9518b469c3d301a0b56/src/leveled_bookie.erl#L1425
The catch all case expects it to be a tuple, though.