How to get rid of hidden lines displayed in shaded mode

As the screen shot shows, the shaded mode displays like wireframe mode but with the surfaces. I’ve tried re-installing the program, restoring the defaults for all the display modes, downgrading my graphics drivers, and turning off anti-aliasing. If anyone has any other thoughts they would be greatly appreciated.


What is the graphics card in the machine? AMD by any chance? If so, this could be your problem.