A colleague of mine wrote to Panasonic to raise the 'flicker' issue to them. Here is the responce they gave: The new PW5 panels do not have the anti flicker reduction system that the PW4 had. t This system on the pw4 reduced the flicker at the expense of introducing more distortion during times of movement in the picture the pw5 panel has much improved moving picture performance but with slightly higher flicker level. the level of flicker is very minor and is only noticeable on very bright static scenes. Also note that most large area displays i.e large screen tvs also flicker to an extent--especially when pheripheral vision is used to view the picture. Minor flicker is a limitation of plasma technology (and televisions). however, the PW5 does have much better moving video performance than the PW4 as a result of the panel drive differences that produce this flicker. The PW5 also has a higher grey scale resolution of 1024 levels as opposed to the pw4 512 levels. thus the PW4 pic has slighltly higher levels of digital colour banding noise in areas of gradual shading. Plasma technolgy is a compromise of the two types of effect (flicker or better motion reproduction) and the human eye tends to pick up on picture distortion more easily which can result in poorer viewing pleasure--especically during films that have large amounts of movement. There is no plan for any upgrade to reduce flicker since this would be at the expense of the panels exceptional motion and gray scale level reproduction. Atleast its honest, but its interesting to see that they 'intentionally' removed the process which reduces the flicker!