[Dovecot] Custom Trash (etc) location

[fusionstream]

Hi there.

I have dovecot 1.2.17 installed on me system.

I'd like to create a gmail-esque imap tree where all imap folders except 
for the inbox are in a subdirectory(?). More importantly, I'd like the 
email client (specifically thunderbird) to be able to recognise the 
folders and thusly give it a special trash/junk/etc icon which I presume 
also makes trash and junk go to, well the truash and junk folders 
automagically. Based on searching the web, I believe that namespaces are 
the solution. I believed that I had set it up to be
1) Inbox
2) IMAP
     - Drafts
     - Junk
     - Trash
     - etc

However, when trying to use namespaces, I get IMAP.Drafts, IMAP.Junk and 
all the other folders also appearing in INBOX, in addition to another 
top-level IMAP.*. What am I doing wrong? If I understand the solutions 
posted on the web correctly, solving this (resulting in only one of each 
type of folder) should make thunderbird automagically recognise these 
"special folders".

This is my configuration:

    # 1.2.17: /etc/dovecot.conf
    # OS: Linux 2.6.18-238.12.1.el5 i686 CentOS release 5.6 (Final) ext3
    ssl_ca_file: /etc/postfix/ssl/cacert.pem
    ssl_cert_file: /etc/postfix/ssl/smtpd.crt
    ssl_key_file: /etc/postfix/ssl/smtpd.key
    login_dir: /var/run/dovecot/login
    login_executable(default): /usr/libexec/dovecot/imap-login
    login_executable(imap): /usr/libexec/dovecot/imap-login
    login_executable(pop3): /usr/libexec/dovecot/pop3-login
    first_valid_uid: *[removed]*
    last_valid_uid: *[removed]*
    first_valid_gid: *[removed]*
    last_valid_gid: *[removed]*
    mail_location: maildir:/var/spool/mail/virtual/%d/%n
    mail_executable(default): /usr/libexec/dovecot/imap
    mail_executable(imap): /usr/libexec/dovecot/imap
    mail_executable(pop3): /usr/libexec/dovecot/pop3
    mail_plugins(default): autocreate
    mail_plugins(imap): autocreate
    mail_plugins(pop3):
    mail_plugin_dir(default): /usr/lib/dovecot/imap
    mail_plugin_dir(imap): /usr/lib/dovecot/imap
    mail_plugin_dir(pop3): /usr/lib/dovecot/pop3
    imap_client_workarounds(default): outlook-idle delay-newmail
    imap_client_workarounds(imap): outlook-idle delay-newmail
    imap_client_workarounds(pop3):
    pop3_client_workarounds(default):
    pop3_client_workarounds(imap):
    pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh
    namespace:
       type: private
       separator: .
       prefix: INBOX.
       inbox: yes
       list: yes
       subscriptions: yes
    namespace:
       type: private
       separator: .
       prefix: IMAP.
       list: yes
       subscriptions: yes
    lda:
       postmaster_address: postmaster at example.com
    auth default:
       mechanisms: plain login
       user: dovecot-auth
       passdb:
         driver: sql
         args: /etc/dovecot/mysql.conf
       userdb:
         driver: sql
         args: /etc/dovecot/mysql.conf
       socket:
         type: listen
         client:
           path: /var/spool/postfix/private/auth
           mode: 509
           user: postfix
           group: postfix
    plugin:
       autocreate: IMAP.Trash
       autocreate2: IMAP.Spam
       autocreate3: IMAP.Sent Mail
       autocreate4: IMAP.Drafts
       autosubscribe: IMAP.Trash
       autosubscribe2: IMAP.Spam
       autosubscribe3: IMAP.Sent Mail
       autosubscribe4: IMAP.Drafts

Any help appreciated.

Cheers.