Tested on Edgy:

There's something strange with this release. Besides the needed zmfixperms trick to avoid the ldap errors during install, I was able to finish the install, and all services start correctly, I accessed webui. The first time I stopped zimbra (zmcontrol stop) all the services stopped, but when I started (zmcontrol start), mailbox service didn't start anymore, It even doesn't appear on starting services context (neither in zmcontrol status) neither after a system reboot. After many tries, I noticed that this happened because I entered the admin interface and disabled the "Enable Dns lookups" option after the install.. It was the moment it broken my install.. Some kind of bug? I noticed also that in services the mailbox appears unselectable before the broke up, which probably related with this problem.. I did the testing on xen virtual machines as usual BTW..