If you turn on 3D-Ana and quickly turn it off again some chunks will get colored wrong like in SUPERFLAT only with grass the grass gets brown.
If you place a block on/at the chunk it turns back normal.
Environment
Java JDK6 and JDK7 64bit
Windows 7 Ultimate 64-bit
16gb RAM for java
AMD FX-4170 Processor
ATI HD7990
Duplicate of MC-3798, please use the search function to see if your bug has already been submitted. Currently over 54% of tickets are being closed as duplicate.