where exactly do you find that this was supposedly a bug before 1.4 and was fixed in 1.4? I see nothing that corroborates your claim....
Tooltip says it reduce damage to the droid by x% and (and if i remember right) increase damage done to all his target by x%.
It was doing the inverse until 1.4:
Increasing his damage received and doing less damage with every stacks.
Better late than never, right?