I have posted my world in the Minecraft section and in the Xbox 360 save sections. My question is this. I have looked at other worlds and they have a ton more buildings and supplies than I do, but their game save is only like 14 Mb tops. My save is currently in the 85-87 Mb range. And it seems that if I try to build new structures, it corrupts the world and it freezes. This is even more evident if the structure is a redstone construct. I have built a lighthouse three times now. The first time it froze as soon as I activated the device. the last 2 times I get it finished and when I finish I save and everything is going fine until I exit out. If I try to come back in it freezes on start-up. I have to revert to the last good save I have on file which is pre-lighthouse. So, 1: Any ideas on how I get my save smaller? and 2: What could be causing the freezing when making redstone constructs??? Any help would be greatly appreciated.