I don't know if its a bug but I hope it is. Sticky pistons don't push/pull other sticky pistons.

What I expected to happen was...:
To have a sticky piston push another sticky piston one block.

What actually happened was...:
That the sticky piston did nothing as though the other sticky piston was obsidian (Can't be moved).

Steps to Reproduce:
1. Place two sticky pistons next to each other and make sure that one pushes the other
2. Then power the sticky piston that is pushing the other sticky piston
3. Then nothing should happen.

Thanks this bug causes a lot of problems to redstone machinery.