We're running into a nasty problem with the callouts and keynotes in that the 'relative path' setting for the database doesn't seem to be working. Couple this with Dropbox and Project Sharing and you have a recipe for disaster. Every time somebody opens their working file or tries to manipulate the notes they all go haywire and the user needs redefine where the database is again for every single note.   The problem appears to be that it's effectively looking for the database in Us