On 30.1.2014, at 11.06, Asai <asai at globalchangemusic.org> wrote: > Maybe this error sheds some light on it: > > Panic: file dsync-brain-mailbox-tree-sync.c: line 111 (dsync_brain_mailbox_tree_sync_change): assertion failed: (brain->no_backup_overwrite) Fixed by http://hg.dovecot.org/dovecot-2.2/rev/fbc8fe46dfce