Bukkit

What steps will reproduce the problem?
1.check sign is true default power is 0 so it checks sign
2.i have no sign so it shud not launch?
3.4x4 stickypiston top 4 blocks fall off im sure if i had nothing under bottom 2 they wud fall off 2

What is the expected output? What do you see instead?
expected output is blocks stay on sticky piston. blocks get dropped instead

What version of the product are you using?
latest 1.4.5

Do you have an error log of what happened?
no errors that i can find

Please provide any additional information below.
running bukkit 1.5 minecraft version

everything else seems to be working thanks