Infinite loading screen You are able to login, but can't get past the loading screen, no matter how long you wait.
Reset your avatar:
Login to https://3dxchat.com/members/
Under "manage account" you can see a list of your avatars and click the "Reset avatar"-button next your avatar name.
Missing mouse cursor Your mouse cursor is nowhere to be found in game.
There is a shortcut to hide the cursor, right click anywhere on the screen (outside of the chat box and the menu)