Hi, I finally found a moment for upgrading my 2.3.9 install (using Simon's RPMs on Red Hat 4.6, 64-bit) to 2.3.11-3 (leaving the config files untouched), after which it seems that replication isn't working properly anymore. If I run the sync_client, just a simple -u paul, I see in my logs: sync_client[18493]: SETMODSEQ received BAD response: Syntax error in Setflags: Invalid modseq sync_client[18493]: Error in do_user(paul): bailing out! Before the upgrade, I'm sure replication was working properly. I checked, both servers are really running the same versions of everything. I noticed that if I strace the sync_client, the folder on which it bails out is always the same. If I reconstruct that folder, and re-run (or just the mailbox), the process continues (up to the next folder that causes the thing to bail out - although it doesn't bail out on every folder). There were more strange log-items related to the sync_client; sync_client[18232]: USER: Invalid type 1 response from server sync_client[18232]: Discarding: 0000000000000000000000000000000000000000 () sync_client[18232]: Discarding: 2 0 0000000000000000000000000000000000000000 () sync_client[18232]: Discarding: 3 0 0000000000000000000000000000000000000000 () sync_client[18232]: Discarding: 4 0 0000000000000000000000000000000000000000 (\answered) sync_client[18232]: Discarding: 5 0 0000000000000000000000000000000000000000 () and a bunch more, like: sync_client[18232]: Discarding: archief.thuispc ... sync_client[18232]: sync_eatlines_unsolicited(): resynchronised okay ... sync_client[18232]: Processing sync log file /data/config/imap/sync/log-18231 failed: Bad protocol sync_client[18231]: process 18232 exited, status 1 Any clue why replication stopped working properly for me after the upgrade? Paul ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html