Put the summary of the bug you're having here
What I expected to happen was...:
Describe what you thought should happen here
I made a semi-auto sugar cane farm and it works.
What actually happened was...:
Describe what happened here
for some reason the top 4 pistons create a fake extended piston block.
Steps to Reproduce:
1. make what is in the attached screenshot and press a button that will invert the inverted signal
2. ...
3. ...
Environment
Put your operating system (Windows 7, Windows XP, OSX) and Java version if you know it here
27th duplicate of MC-127, please use the search function to see if your bug has already been submitted. Currently over 45% of tickets are being closed as duplicate.