> Perhaps 2.13-nn and 2.17-nn would be a better choice for the versioning > now, because of the changes made by the Unison team. That is all 2.13.xx > are interoperable with each other. 2.13.xx and 2.13.yy are interoperable > for any xx and yy. Same for 2.17.zz... Thanks, this is a good idea. Let me put this together and repost. A.