I must say, this is an incredibly exciting release. The Change Log has me drooling. Thank you to everybody whose hard work goes into ISPConfig's development.
Is the Dovecot configuration file that is installed to /etc/dovecot/dovecot.conf
aimed at Dovecot 2.0? I ask because it appears to be much, much longer than the file used in previous versions of ISPConfig, and during the update:
* Restarting IMAP/POP3 mail server dovecot
Error: Error in configuration file /etc/dovecot/dovecot.conf line 685: Unknown setting: sieve
Fatal: Invalid configuration in /etc/dovecot/dovecot.conf