Bug "works" only with redstone-torch on side, not on top
How to reproduce:
Reproduce the situation in picture 1.
Set a (solid) block on top of the redstone, the torch should turn off now (Picture 2)
It also works the other way round:
Reproduce picture 2 (except of the torch having the state it shoud have)
delete the block on top of the redstone, you get picture 1, but with the torch turned off.
Hope my english isnt too bad to understand ^^
Duplicate of MC-3703