Since last evening, we've had an influx of users into #pidgin, trac, and the support mailing list because they're not able to connect to MSN. Initially, we thought this was a server-side issue, because the error message we receive from the server makes it look that way. However, we've come to find that it is actually a minor protocol change in which the server now expects us to send a piece of data we don't send. We are working on a solution. There is no need to send further mail to the support list, open new tickets, or pour into #pidgin.
Again, we know what the problem is and are working to fix it.