In the snapshots 14w25a and 14w25b, plants (grass, crops, flowers, mushrooms) appear darker than they should. Smaller plants, such as poppies and dandelions are also rendered off-center.
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duplicates 1
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Eariler one found. MC-57159
Also plants spawning off centre is a feature.
This post is a duplicate of MC-57084 (probably, there might be an earlier one).