If you place down a chest in, you have the ability to walk trough said chest. To visualize this, I created a short video:
html 5 Version(1mb)
gif Version(11mb)
So far I've only been able to recreate this in singleplayer creative mode and it appears that the orientation of the chest does not matter.
Edit: This issue is pretty inconsistent and it usually takes a few tries to pass through the chests.
Edit 2: Added the console output
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CubeTheThird
Please attach the complete output of the "Development console" which can be found on the second tab of the launcher.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".
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Output of the development console while opening the world, doing the bug and closing the game again.
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http://www.youtube.com/watch?v=p-8G_R8tLr4
I have made a video showin how to consistently recreate this issue.
First you start walking against the chest,
then you look at any chest, you should start jittering,
then look away from the chest, you should have gone through
Tested in 14w04b