Issues with PN50C7000 set as C8000 in service menu

What if any issues have been experienced setting via service menu, the PNxxC7000 as PNxxC8000 via the Service Menu?

Aside from getting Motion Judder options (on the C7000) and two additional calibration settings (CAL-Day and CAL-Night); what else is occurring to the TV?

I have noticed changes how standard def HD is displayed. Regardless of setting 16:9 or Screen Fit options, the standard def HD (like CNN HD) is cropped to a 4:3 format or a shrunken 16:9 format equally centered with black bars top/bottom.

Are there other issues with running the PNxxC7000 in PNxxC8000 mode?