Put the summary of the bug you're having here
What I expected to happen was...:
Describe what you thought should happen here
The piston would stay retracted
What actually happened was...:
Describe what happened here
the piston extended
Steps to Reproduce:
1. Redstone block on top
2. Anything(or air) in the middle
3. Piston adjacent to middle block
Environment
OS: Windows 7 (ver 6.1, arch x86)
Java: 1.7.0_51 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.4.2 (bootstrap 4)
Minecraft: 14w20b (updated Mon Apr 14 09:29:23 EDT 2014)
Please don't put down the affected version as a future version! You DON'T have access to it yet!
Duplicate of MC-108