OK, so in earlier versions, I simply could not connect to servers. The game appeared to connect and it claimed to synchronize, but it clearly failed every time. The world was always empty and the time was always at zero. In the new version, I can connect and synchronize properly, but I lose connection without warning after several seconds almost every time. (It does occasionally work for a prolonged period of time, but usually not.) Also, when I lose connection, I stay in the world, but the player list empties and any changes I make are not saved after I leave.