I've used sync without observing any hickups on 4 machines for quite a while and just took the plunge and configured it on my NAS. I've got 100Gb of pretty important information stored and felt quite secure as it is redundant across many machines and drives. However I have just observed that saving pictures from Safari to my Pictures folder works fine, and then the subfolder with the new downloads is removed shortly thereafter. I don't ever want that to happen. It makes me question the fundamental premise. Is there a way to stop this from happening or determine what is going on?