samba - Aug 2004 - mount with NULL password

Hi, I failed to mount samba 3.0.6's share with NULL password:

# mount -t smbfs -o username=alpha,password="" //192.168.3.101/pub
/mnt

And what samba log say:
	[2004/08/24 16:30:08, 2] auth/auth.c:check_ntlm_password(312)
	  check_ntlm_password:  Authentication for user [alpha] -> [alpha] FAILED
with error 	NT_STATUS_WRONG_PASSWORD

But it is ok when using samba 2.2.8a!
	

Best Regards!

Jacky Kim
.