User is already logged in Zone

[Lapo]

The problem has been replicated and fixed. We will release a patch in a week. If you want to test it in advance let us know via email.

NOTE: FYI the problem can be replicated but it's not as easy as it looks. If this is happening very often in your clients you might want to make sure that you are correctly handing the connection events and login success and failure.
We were able to reproduce it via brute force, or by disregarding login errors which in any case should be handled correctly.