This release uses a new protocol between the client and server, which means a 1.2.0 client is only compatible with 1.2.0 or newer servers, and a 1.1.8 client can't connect to a 1.2.0 server. The new protocol is designed to be easily extended, so we should never have this problem again.

1.2 will come with an updated version of 1.1.8, we call it 1.1.X, which enables you to visit servers which did not update to the new version yet. This client uses the same audio backend and libraries as 1.2 so it fixes some problems people reported with systems unsupported by Mumble 1.1.8 stable (like Windows 7). We will eventually remove this client from the default installer once we feel that the new protocol has spread wide enough in our user base.