I notice when the RP 91 is in the 4:3 mode, there is a small black bar on the right side. This is within the 4:3 picture. Not the black bars it creats to scale too 4:3. Has anyone else noticed this? I was wondering if there is a way to get rid of this bar. I went through the procedure to center the picture. It has no effect. It is as if the picture is shifted to the left within the 4:3 frame. Would love to here from other RP 91 owners.