Can't save to folders

[Dave G.]

When I login through imap, I can see everything in ~/mail/ just fine.  I 
cannot save to any of them.  If I have an autocreate-autosubscribe folder 
(ZZZ here), it shows up as empty (correct).  Then if I save something to 
it through imap, a file ~/mail/ZZZ appears, but nothing actually gets 
saved to it.

David Griffith
dave at 661.org

===begin quote===
# 2.1.7: /etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.7 
auth_mechanisms = plain login
auth_verbose = yes
log_timestamp = "%Y-%m-%d %H:%M:%S "
mail_location = mbox:~/mail:INBOX=/var/mail/%u
mail_privileged_group = mail

passdb {
   driver = pam
   args = login
}

userdb {
   driver = passwd
}

protocols = imap

service auth {
   executable = /usr/lib/dovecot/auth
   unix_listener /var/spool/postfix/private/auth {
     group = postfix
     mode = 0660
     user = postfix
   }
   unix_listener auth-master {
     group = mail
     mode = 0600
     user = mail
   }
}

disable_plaintext_auth = yes
ssl_cert = </etc/ssl/certs/foo.bar.com.cert
ssl_key = </etc/ssl/private/foo.bar.com.key

protocol lda {
   auth_socket_path = /var/run/dovecot/auth-master
   log_path =
   mail_plugins = sieve
   postmaster_address = postmaster at foo.bar.com
}

protocol imap {
   mail_plugins = " autocreate"
}
plugin {
   autocreate = ZZZ
   autosubscribe = ZZZ
}