My two month old refurbished unit started doing this last night! I guess from the age of this post there is no solution.
As I posted in the official hd66 thread, I can live with the black dots. The one white dot, however, is SCREAMING at me from the screen.
I had an Infocus X1 DLP for like 8 years without issue. Yes my Optima is a refurb... but at less than two months, I can't say that I will ever buy from them again. If this is what a dead picsel is like.. How can anyone live with it.
My home theater experience is completely ruined by this one glaring singular point of light!