[Failed to download PostDownload: Cannot create a file when that file already exists.]

The problem still occurs with 1.2.82, and removing all .SyncOld files doesn't fix it for me. I've fixed it in the past by deleting all related files, then the actual file synced properly from other clients. If you it that way, you have to save a copy before risking deleting the file in question, so it's a chore. When I tried deleting just the .SyncOld file, it didn't sync, and then when I removed the file, it got deleted on all clients. So the order in you fix things matters.

 

I agree.  mrpbdy's advice does not work for me either.  In addition to his advice, as previously stated, I've wiped out the entire folder from sync and the file system.  Set up sync again in a different location on the file system, only to have the issue recur shortly after. 

Actually, resyncing occurred after deleting the syncold file as mrbdy suggested.  But the problem isn't that there's not a way to manually fix the issue, but that the issue occurs at all and requires manual intervention.  I've updated to 1.2.82 and ensured everything is syncing properly.  I'll keep you all updated if the issue occurs again.

[Failed to download PostDownload: Cannot create a file when that file already exists.]

The same here. ML OSX and Win7 machines all with BTSync 1.2.73 between full-access folders. Sometimes BitTorrent Sync breaks/corrupts the file. With older versions 1.1.xx did not happen.

 

I am also experiencing this issue.  I also did not experience this issue before 1.2.73.  It is only happening on one of my systems.  I tried removing the folder from BTSync, deleting the folder from file system, and then resetting up sync for that folder in a different location.  Issue started again almost immediately.  The system I am experiencing this on is a Windows Server 2012 virtual machine on windows azure.  Maybe I never restarted after upgrading to 1.2.73.  Going to do that now.  Please help!