Thinking about the problems we're having now contacting people to get permission to switch to the Boost license, I got to wondering what would happen if at some point in the future the Boost license needed to be changed (for instance, due to some legal challenge). I assume the possibility of it changing was considered; after all, usually if you give something a 1.0 version number you leave open the possibility of a version 1.1 or 2.0. What could we do to avoid even worse problems if that ever happens? Would it make sense to have people add their names to a blanket permissions file (or add explicit permission in their submissions) that would allow the copyright for their submissions to be updated under certain circumstances in the event that they could not be contacted for permission? What legal issues would be involved in such a case? Just a thought, Mike