Just got up a test environment running 7.0 beta 3 (new install, not an upgrade) with three servers:
Server 1: ldap master, snmp, proxy
Server 2: ldap slave, mailstore, logger, apache, spell, convertd, snmp, memcache, mta
Server 3: mailstore, archive/discovery, apache, spell, convertd, snmp, memcache, mta
When moving accounts from server 2 to server 3... or from server 3 to server 2, that account will not work properly until a zmcontrol restart happens. The only symptom is:
The folder list on the left hand side of the web console doesn't display until the restart. This includes mail, preferences, calendars - everything that should be displayed in that column fails to show up.
What's odd, is that VIEWING the account from the admin console works fine, it's just when logging in to the web client. I've observed this from both Firefox and Chrome so far.