[jbearamus]

i had the problem, at first it didn't bother me because i couldn't see the dust when the screen was on but it really started to build up so i took it in to see what they'd do and they just replaced it.
now as for a fix they probably won't bother fixing existing units, they would probably phase them out with refurbs that have been given the fix then they'll take your unit, apply the fix, then give it to someone else as a refurb