I wonder how many other people are getting this error too. With the scale of my tree and its media, it requires an awful lot of effort to manually verify my media after sync's. Why on earth are we not told which file it is so that we just manually fix it?
Until this sync mechanism works error free, it ought to do a *much* better job of providing information to users about what has sync'ed and what hasn't. (My guess is they'd have to do some coding to figure out what did sync and what didn't.)