Hey folks! We've released a Synergy beta branch containing a handful of bug fixes. This will help us iterate though issues and new features faster without disturbing the baseline of Synergy servers.
To opt-in right click on Synergy in your Steam Library, go to Properties, then under the Betas tab and choose "Public Beta". As for Dedicated servers, you may update your server by issuing the command app_update 17520 -beta beta.