How do I get the other half of my house back?

Question

Half my house disappeared in Minecraft. I tried to update from 1.5.2 to 1.8, but it didn't work. So I went back to 1.5.2, and spawned at the beginning where I spawned when I created the world. I went to look if my house was still there and it was. Half. I thought it was a glitch and it had to generate. but when I came closer it was half gone. My farm, my chests, my mine,...

Answer 1

In Minecraft 1.8 there are more blocks than 1.5.2. So when you construct the house in 1.8, and go back to 1.5.2, all 1.5.2+ blocks and items will be lost. Nothing to do about it but next time make a back up!