I have made a search and I have seen that some of the members have identified this artifact in Plasma screens. At first I thought that I was being misled (so much time with DLP PJs can seriously harm your senses ), but the more Plasmas I see the more obvious it becomes that the artifact is there. Anyone has an explanation for this? I'm curious... in (single chip) DLP PJs the cause for rainbows is sequential color, but in Plasmas, the electric signal should excite the R, G and B subcells at the same time. In any event, they are a different kind of rainbow, in Plasmas it's a yellowish - greenish (mustard I would say) flash on bright whites. The beginning of the League of Extraordinary Men is a particularly good test.