Recently, there had been an article in a prominent German IT magazin about using Synthing to create backups from any type of machine on a Raspberry Pi. So last week I tried it out and quickly run into a problem that could have been dangerous. What I tried out was to backup my Firefox and Thunderbird profils with synthing. I switched on simple file versioning to be on the save side even in case that something is accidentally deleted. The problem was that, probably due to interrupted synchronisation sessions, Synthing could not decide whether the file version on the orginal or on the backup machine is the most recent one. In this case it transfered an old file version with some additional intermediate filename extension from the backup to the original machine. So I ended up having doublicates of my email inbox and other folders in my Thunderbird profil that Thunderbird nevertheless recognized as valid inboxes, etc. The problem was easily solved by searching for the intermediate filename extension and deleting all those files manually. This experience suggests to me that it is perhaps not a good idea to use Synthing for anything else than the deliberate exchange of manually managed files in folders only and specifically dedicated to synchronisation.