When a piston gets powered and the block its moving gets also powered, the piston wont turn off, as you can see on the screenshot.
This is a Bug because its exceeding the naturally range of redstone.
Related issues
Attachments
Comments

[media]
When a piston gets powered and the block its moving gets also powered, the piston wont turn off, as you can see on the screenshot.
This is a Bug because its exceeding the naturally range of redstone.
migrated
(Unassigned)
Unconfirmed
multiplayer, piston, redstone
Minecraft 1.6.4
Retrieved