lmtpd case sensitive?

[Jeff Gustafson]

	Using 2.1.11 cyrus or the latest 2.2 alpha with postfix produces 
'550-Mailbox unknown' if the recipient address has any capitals in it.  Is 
this proper behavior?  I assumed that email addresses were case 
insensitive.  What's worse is that it's inconsistent:

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 bern.xxxxxxxxx.com ESMTP Postfix
ehlo adsf
250-bern.xxxxxxxxx.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH PLAIN LOGIN DIGEST-MD5 CRAM-MD5
250-XVERP
250 8BITMIME
mail from: jeffgus at xxxxxxx.net
250 Ok
rcpt to: jeffgus at YYYYYYYYY.COM
250 Ok
data
354 End data with <CR><LF>.<CR><LF>
Subject: adsf

adsf
adsf