[Dovecot] Dot Lock timestmap, users disconnections from roundcube

[Ed W]

Hi

>  We are running dovecot 2.0.13 with mdbox+zlib on RHEL 5.7 x64, ext4. We use NTP.

Quick check, but by "NTP" you mean the background daemon and you don't
have some cron job running ntpdate or similar every so often?

No idea, but since it looks like a clock related curiousity, then
knowing if the clock is spot on accurate or drifting would be
interesting to know?  Simple comparison against other machines over a
similar period to you having problems might be accurate enough?

Good luck

Ed W