[Dovecot] "GETQUOTA" Working?

[richs at whidbey.net]

Using beta9, I've tried "quota = dirsize:storage=10240" and "quota =  
maildir:storage=10240", but I can't seem to get the IMAP commands to  
respond:

* OK Dovecot ready.
a LOGIN user pass
a OK Logged in.
b CAPABILITY
* CAPABILITY IMAP4rev1 SORT THREAD=REFERENCES MULTIAPPEND UNSELECT  
LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS
b OK Capability completed.
c GETQUOTAROOT INBOX
c BAD Error in IMAP command GETQUOTAROOT: Unknown command.
d GETQUOTA ""
d BAD Error in IMAP command GETQUOTA: Unknown command.
e LOGOUT
* BYE Logging out
e OK Logout completed.

(Per http://www.faqs.org/rfcs/rfc2087.html)

Apparently "QUOTA" isn't being advertised, and none of the commands  
are accepted.  Any ideas?

Rich