There are two possible reasons for this. The first is that you're running at 16bpp and have hit this bug 423632, another is that you're using cheap LCD's which only support 18bit color http://en.wikipedia.org/wiki/Color_depth#LCD_displays .
There are two possible reasons for this. The first is that you're running at 16bpp and have hit this bug 423632, another is that you're using cheap LCD's which only support 18bit color http:// en.wikipedia. org/wiki/ Color_depth# LCD_displays .