Richard Karls

The bug also happens when activating a piston. Here is how to reproduce in any world, independent from the location:

Place a redstone torch. Place a piston (any type, facing downwards) 2 blocks below the torch. Done.

You can now place/remove redstone wire next to the torch without the piston noticing. It will only react upon a block update (e.g. by placing a block next to it).

Please confirm this bug.

I've been having the same problem since 1.5.

The bug seems to be depending on direction and coordinates and weirdly sometimes depends on whether there is another redstone wire connected to the powering wires 3 blocks away and similar stuff.
The bug is independend from the gamemode and occurs in both single and multiplayer.

You can reproduce it by creating any world and placing:

• cobblestone at x6.5 y7 z0.5, x6.5 y7 z1.5 and x6.5 y7 z2.5

• a piston (any type, facing downwards) at x6.5 y6 z0.5

• redstone wire at x6.5 y8 z0.5 and x6.5 y8 z1.5.
  Then place and remove a redstone torch at x6.5 y8 z2.5.

Please confirm.

Unfortunately I have noticed this bug disabling some old adventure map riddles and two of my mashines, so I hope you can resolve it.