Minecraft Forums

I have a few mods installed, industrialcraft buildcraft rei's minimap and marvelous moon mod. My friends installed them too but when I get into the world, or he gets into my world, except for the ground we're standing, the other places are like floating with all sorts of things like jukebox, or gravel, and many other things. But the server owner who is me or my friend can see minecraft world normally. We tried it using LAN and also using a minecraft server, the same things happens.