It appears that most models with this problem as best I can recall are the HLS series, and version PB02. This includes 42" to 50" units.
Anyone new or posting to this board should identify their TV's model and version numbers , and hours on the lamp so that we can define a list of units with this problem. One thing I suspect is that the PB02 versions of the HLS series arose from a problem they had and the new version was intorduced with a different DMD board and color wheel controls. (Pez's documentation mentioned that the DMD board in the PB02 units cannot be replaced with the PB01 DMD board, since the DMD board controls the synchronization with the color wheel and is different in the original vers new DMD board. That's probably another reason Samsung recomends replacing the whole engine assembly!)
I talked to the Attorney working on the Samsung " Shadow"class action suit and he is very knowledgeable about these rear projection TV's. He said he'd be willing to incorporate this problem in the existing suit, but he has not heard of this problem eventhough he claims to have talked to thousands of people ( probably an exaggeration). So I volunteered to send him further information.
So if any of you have found web sites with people complaining about this problem please post it or send me a private message. If you send me your email I will copy you on all correspondence with the attorney.
Also, posting more titles with descriptions of the problem in different terms, eg, white spots, starfield, white specs may lead to more folks find our discussion group.