Welcome to the 1.9.0.3 beta! Please remember that worlds opened on beta builds cannot be reopened on previous builds. We recommend that you always make a copy of your worlds before opening them in the beta.beta players can only connect to other players on the same beta build and do not have access to realms while on the beta. For a complete chargelog visit aka.minecraftbeta and please report bugs you find on bugs.mojang.com. You can chat with us about the beta in the #beta-n-bugs channel on discord.gg/Minecraft