Build 1.2.73 Two PCs running, and initially all looked ok. I sync a Thunderbird profile from PC A to PC B, purely for backup (TB isn't installed on PC . Thousands of little files basically. Everything was synced ok. For some reason after a reboot today of PC A, PC A tells me its syncing files (downloading) from PC B. PC B says nothing in the history, but under Devices shows an Upload of hundreds of megs and I can see on network stats that PC B is transmitting files back to PC A. I'll see if I can send both hosts logs in.