I have a Sharp 28JW74. The picture quality is good however, when using 14:9 zoom, 16:9 zoom, & Superwide screen modes the picture flickers at the top left, center, & right of the screen. It's often drowned out by the colour on screen but as soon as a dark scene comes on or the screen goes black (such as the end credits of a movie) you can see the flickering. 4:3 mode and Anamorphic widescreen mode don't seem to suffer from this problem. Anyone got some ideas please ?.