1.6 Blocks are disappearing in a certain radius
What i think should happen is that the 1.6 Blocks should stay there while running 1.6 (I have not used 1.5.2 since the release of 1.6)
What actually happens is that in a certain radius 1.6 blocks (mostly Hardened Clay) will disappear.
Steps to Reproduce: not sure if it works for everyone and all i have done is place the clay. Nothing else.
This happened to me after 1.7.2 came out. In one of my maps I cant place blocks within a 16*16 area. All the blocks i placed there before 1.7.2 are still there. Everey time I place a block in the16*16 area, log out and then in again, the blocks are gone. I can not place any blocks in that area.