Yes, you have different symptoms, but the "cure" seems to be the same: have a bright image in some part of the screen.
Mine was also an overseas unit, however nokia didn't even reply to my email asking where I could get it repaired (obviously not under warranty), so I ended up replacing the screen myself.
As you can see in the above thread my supplier has no screen in stock now, but there are other suppliers.
However, as long as it works with your "hack" there's no need to replace it.