I’ve got a Samsung TV and a Motorola PVR. Until a few days ago the picture was fine. The non-HD channels were automatically 4:3, the HD were 16:9. Now, the guide is elongated, as are the non-HD channels. The HD channels are also elongated, appearing more like ‘letterbox’ format, all stretched out sideways. If I change the TV setting to 4:3 while on HD channels, the picture has the correct aspect, but is centered in a smaller box on screen. After about 2-3 minutes, the picture will automatically pop back out to the widescreen, elongated mode. I’ve tried fiddling with settings on both the TV and the PVR but haven’t had any luck. Any ideas?