Lamps, Signs Fence Gates, and sheep eating grass don't give block updates!

Previously, when a redstone lamp or fence gate was toggled it would cause a block update (i was attempting to use it to update a piston for redstone purposes), but in the latest snapshot it does not. Regardless of whether this is a "fix" or a bug, a vast proportion of redstone contraptions use this functionality and if it is removed then they will all be completely broken. It would be a shame if the "Redstone update" broke the vast majority of redstone made since 1.2.