Bukkit

v0.9.1 :

• Bugfix: now checking if the second piston is facing the same direction as the first.
• Commented debug code.

v0.9 :

• Still in beta, no enough testing, but there shall not be any but
• Dispensers cannot be opened from their front
• If a sticky piston pulls another one, the block "stuck" to the second will be pulled too
• Config file: you can disable any of the features