Hi, I have recently purchased, second hand, the Sony VTX D800U Freeview box and am very happy with it. However, I have noticed on certain channels that I can spot what looks to be detail from other channels - for example this morning on Channel 4 I could see the GMTV Number, and then something from Channel 5 appeared! This is only lightly in the background but is affecting the picture quality. Does anyone have any suggestions as to what might be causing this!? Any advice would be much appreciated!