Hi guys. Have any of you ever experienced the oh so common purity error on a Sony widescreen TV, or indeed other manufacturers? Mine has a highly visible green stain in the top-right hand corner of the screen, clearly visible when the background is white/yellow, on normal TV and DVD play. Did you have the set replaced? I have only had mine 2 months. Does manual degaussing fix it? Or fitting purity magnets? Or should I just insist they change it? I am on my second set already - SONY KV36FS70. The geometry is also shocking!!! Advise please!