I use sync across 3 macs on a local network. And I have lost count of the number of times this has happened to me - driving me crazy. I have 15TB+ of data synced, and every time I have to re-sync you're killing my hard drives.
I have my machines set on a schedule to reboot / install updates periodically. I believe this is when it must happen - fairly unacceptable that Sync can't just fall back to the last saved version of the identity when this happens, rather than prompt for a new one. Whe