Minecraft wiki entry for Development_versions, associated text: Added 3 new textures: xmaschest.png, largexmaschest.png, and skis.png
xmaschest.png changes the chest texture to resemble a red gift.
largexmaschest.png changes the large chest texture to resemble a green gift.
skis.png is unused, dummy file. Dinnerbone said he added this file as a red herring.[4]
Chests will use these textures on December 25.