Still no luck signing in for me.
It has failed to sign in at all on my laptop - coming up with the message about being unavailable at this time, check firewall blah blah.
However, I managed to sign in one time on my PC but after installing the mess patch I can't sign in at all on here either.
I have since repaired Messenger but still cannot sign in. Other users on both computers can sign in so is it just my account? Grr this sucks. Back to 7.0 for me.
EDIT: For some reason, after I attempt to sign in, my email address is changed automatically to 'K I E R A N' as shown and my password appears 6 characters shorter than it actually is. Maybe this is linked with the problem