[Dovecot] Can't purge folders in Trash with listescape loaded in 1.1.2

[Adam McDougall]

I made sure I didn't have the Trash folder open by restarting dovecot, 
then going to File -> Empty Trash in thunderbird. 

rawlog in, listescape loaded:
3 select "Trash"
4 list "" "Trash/*"
5 delete "Trash/test"
6 IDLE

rawlog out, listescape loaded:
* OK [RAWLOG TIMESTAMP] 2008-08-08 10:54:14
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft Old NonJunk $MDNSent 
unknown-3 $Forwarded unknown-0 unknown-5 unknown-7 Junk unknown-1 
unknown-4 unknown-9 unknown-10 $label1 $label4 $label5)
* OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft Old 
NonJunk $MDNSent unknown-3 $Forwarded unknown-0 unknown-5 unknown-7 Junk 
unknown-1 unknown-4 unknown-9 unknown-10 $label1 $label4 $label5 \*)] 
Flags permitted.
* 0 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1194838495] UIDs valid
* OK [UIDNEXT 55158] Predicted next UID
3 OK [READ-WRITE] Select completed.
* LIST (\HasNoChildren) "/" "Trash/test"
4 OK List completed.
5 NO Unknown internal list error
+ idling

rawlog in, listescape loaded:
3 select "Trash"
4 list "" "Trash/*"
5 delete "Trash/test"
6 unsubscribe "Trash/test"
7 IDLE

rawlog in, listescape loaded:
* OK [RAWLOG TIMESTAMP] 2008-08-08 10:56:34
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft Old NonJunk $MDNSent 
unknown-3 $Forwarded unknown-0 unknown-5 unknown-7 Junk unknown-1 
unknown-4 unknown-9 unknown-10 $label1 $label4 $label5)
* OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft Old 
NonJunk $MDNSent unknown-3 $Forwarded unknown-0 unknown-5 unknown-7 Junk 
unknown-1 unknown-4 unknown-9 unknown-10 $label1 $label4 $label5 \*)] 
Flags permitted.
* 0 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1194838495] UIDs valid
* OK [UIDNEXT 55158] Predicted next UID
3 OK [READ-WRITE] Select completed.
* LIST (\HasNoChildren) "/" "Trash/test"
4 OK List completed.
5 OK Delete completed.
6 OK Unsubscribe completed.
+ idling

dovecot -n:
# 1.1.2: /usr/local/etc/dovecot.conf
ssl_cert_file: /usr/local/etc/apache22/ssl/mail.pem
ssl_key_file: /usr/local/etc/apache22/ssl/mail.pem
login_dir: /var/run/dovecot/login
login_executable: /usr/local/libexec/dovecot/imap-login
login_max_processes_count: 512
max_mail_processes: 1024
mail_max_userip_connections: 25
verbose_proctitle: yes
first_valid_uid: 1000
first_valid_gid: 1000
mail_access_groups: postlocal
mail_location: 
maildir:%h/Maildir:CONTROL=%h/Maildir/dovecot/private/control:INDEX=%h/Maildir/dovecot/private/indexes
mmap_disable: yes
mail_nfs_storage: yes
mail_nfs_index: yes
mail_drop_priv_before_exec: yes
mail_process_size: 1024
mail_plugins: acl fts fts_squat listescape quota imap_quota
mail_log_max_lines_per_sec: 0
imap_client_workarounds: delay-newmail outlook-idle netscape-eoh 
tb-extra-mailbox-sep
namespace:
  type: private
  separator: /
  inbox: yes
  list: yes
  subscriptions: yes
namespace:
  type: private
  separator: /
  prefix: mail/
  hidden: yes
  subscriptions: yes
namespace:
  type: private
  separator: /
  prefix: Mail/
  hidden: yes
  subscriptions: yes
auth default:
  passdb:
    driver: pam
  userdb:
    driver: passwd
    args: system_user=
  socket:
    type: listen
    client:
      path: /var/spool/postfix/private/auth
      mode: 384
      user: postfix
      group: postfix
plugin:
  quota: fs:noenforcing:inode_per_mail
  acl: vfile:/usr/local/etc/dovecot-acls:cache_secs=10
  fts: squat