As a further heads up folks - it is looking like the 4.5.6 server release may get delayed until early next week. This is to allow us to create a proper mechanism for controlling with specific versions of Lobby Services are active at a time... (right now, it is possible for both old and new lobby services to be active during an upgrade transition - and given how much lobby processing has changed in this release - that wouldn't be good).
That said - the rest of 4.5.6 is ready - so we are going to be doing a bit of an incremental roll-out...
We are starting to release the 4.5.6 Client Libraries today
We are also making the 4.5.6 Relay Servers available (on our existing 4.5.5 servers) <- this is a simple feature gate for us to enable.
Then, once the 4.5.6 servers (with the new Lobby Servers and a few other fixes) are available, we will release them... that should be either late this week, or more likely early next week).
Anyway, just FYI...
Paul.