Default Note 3 - Transparent notification bar has black shading after changing density

I recently changed LCD Density in build.prop from standard 480 to a lower value.
After doing this, the top edge of the screen is shaded / blurred black when i have a transparent notification bar.
Alarmed, i restored a cwm backup but the problem still exists.

Anyone have any ideas ?? I'm slightly worried i might have damaged the screen.

Thank you