Hi anyone know the response screen rate of this ? http://www.sony.co.uk/view/ShowProd...w_en_GB&pageType=Overview&category=TVP+LCD+TV the picture looks like it "tears" sometime ? although it's not to annoying in most scenes but can be. I cant find the tech. specs of it online (well i can but nothing about the response time) . is there a firmware upgrade for this ?