Going from snaps to 1.7.2 chest

anytime you go from the new snaps and then back to 1.7.2, all chests in the world are completely empty. I go back to 1.7.2 because all versions above are just SO blurry on OS X... it's blurry, not much slower, but painful to the eyes.

I'm sorry if this seems a little rage-y. You've done magnificent work till now, so I hope you keep it up