Dovecot !include_try does not work with 'deliver' - mail delivery fails

[dovecot.bugs]

Binary package hint: dovecot-postfix

dovecot-postfix sets up two subdirectories in /etc/dovecot/ called 'auth.d' and 'conf.d'. I understand the reasoning behind this is to facilitate future upgrades using the package manager. However! The delivery agent '/usr/lib/dovecot/deliver' does not process 'include'/'include_try' statements as indicated by:

# Config files can also be included. deliver doesn't support them currently.

That line is found in 'dovecot.conf'. I was unable to send e-mail from a remote e-mail address to one on the local box until I merged all the auth.d/* and conf.d/* configuration files into the main 'dovecot.conf'. However, I was able to connect to and log into the POP3 server using Thunderbird and send mail out through Postfix via SMTP, so I can see how cursory testing of this setup would work as 'deliver' isn't involved in either process. The error in my mail logs that I was receiving was "dovecot: deliver([redacted]): Fatal: postmaster_address setting not given", yet "dovecot -n" clearly indicated that the "postmaster_address" was set and I could see the address in the configuration file in the conf.d/* directory.

Adding '-c /etc/dovecot/dovecot.conf' to the Postfix 'master.cf' file had no effect. Only when I merged the files into 'dovecot.conf' and commented out the 'include_try' lines did 'deliver' start delivering mail.

Description: Ubuntu 10.04.2 LTS
Release: 10.04

dovecot-postfix:
  Installed: 1:1.2.9-1ubuntu6.3
  Candidate: 1:1.2.9-1ubuntu6.3

The folks in the Dovecot IRC channel recommended that I file a bug report after we worked together to figure out the problem.