Problem with AUTH response from MSN

I've just seen what looks like a problem with the authentication on MSN, 
and I was wondering if anyone else has either seen the problem before, or 
has any comments..

Here's a (slightly obfuscated) transcript of the session:

S 1	+OK CPIMSPOPA16.email.msn.com POP3 Server
C 2	AUTH MSN
S 3	+
C 4	gobbledegook=
S 5	+
C 6	
S 7
C 8	STAT
S 9	+OK Mailbox for markhaas has 4 messages.

It all looks OK until line 6 or 7. I *think* the problem is at line 7, 
because, from my reading of RFC1734 the server should respond either '+...' 
as a challenge, or '+OK' or '-ERR' to indicate the result of the 
authentication. A blank line from the server wouldn't seem to be a valid 
response

Now, I can easily make the client ignore a blank line at this stage, but I 
only want to do that if (a) MSN is working properly, and I misunderstood 
the standard or (b) MSN isn't going to fix their server soon (anyone from 
Microsoft listening? ;-) )


(The 'STAT' from the client is because the sequence is confusing the 
client, so it's sending a 'STAT' command before it should do and then all 
the server responses are out of sync)

Paul				VPOP3 - Internet Email Server/Gateway
[email protected]			http://www.pscs.co.uk/