In certain parts of my creative world, if i place or destroy blocks in that part and then exit and reenter the world, the blocks destroyed get restored or the blocks placed disappear. My world has been around since 1.3.2 and this issue has happened since 1.7.2
What I expected to happen was...:
The blocks to stay where they were
What actually happened was...:
They disappeared when exiting and reentering the world
Steps to Reproduce:
1. I don't know how to reproduce this
2. ...
3. ...
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Please attach the complete output of the "Development console" tab of the launcher.
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If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".
Try do do this when the issue occurs.

Duplicate of MC-409 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.