Re: "Tim, I thought there was only one "shut up and calculate" interpretation, and that's the one where you shut up and calculate - rather than talking about many worlds. Perhaps you mean it's a "talk rather than calculate" interpretation?".

No, I mean those interpretations are functionally equivalent - in that they make the same predictions. That is not true of CI, or other collapse theories - e.g. see: http://www.hedweb.com/everett/everett.htm#detect