WalterH Strange, my own 2 mailboxes don't have sync errors since at least february when Gromox 2.41 or so came out if I remember well.
All of my 3 servers run gromox 2.45 now, of which 2 still have sync errors.
I wonder what could be the difference between those systems (I've installed them quite the same way, they are on the same physical server, and share the same frontal haproxy).
Do you know which service does the actual sync work ? Is it gromox-zcore or midb ?
I wonder how I could put all three servers in debug mode to see what if I can catch some differences.