ND7 B2 bug (well, it is a beta!)

I only got around to upgrading my server
to ND7 B2 yesterday.  Soon after, I noticed no SMTP mail was inbound.
 The error appearing on the console was

"SMTP Server: Authentication is
not enabled in the SMTP Internet Site Document for (blank)"

No SMTP authentication is enabled.  A
quick look-up and I noticed this
thread on the ND7 Beta Forum.
 It does look like an RC bug.  Disabling the Internet Site feature
in the server document and going back to the older configuration resolves
the issue.  BTW, this aint a complaint.  Apart from that, the
beta is humming along nicely.  At least IBM are on schedule with their
releases.  Ed Brill has a
lot to say on the M$ Exchange
betas (or distinct lack of them).