Immutable chunks

[nala2624]

Title: Immutable chunks

Version: 3.1.2

OS: Windows 7 64 bit

Java Version: Most recent

Description of Problem:

This happened on both my server and my brother's, often times, chunks are immutable. As in no blocks can be destroyed or placed within these chunks. The world renders fine it's just these chunks can not be changed. We can walk through them but not actually alter them.

Error Messages:

Error Log:

[The_New_Pro]

Are you op?

[nala2624]

Yes, I changed both of us to OPs and even tried it in creative mode.

[nala2624]

Tested this on a fresh vanilla server and we're getting the same problem.