I am using a gtx460 with recent drivers. Settings are the same in the beta and the stable version, only difference being that the stable release works smooth when dragging bodyparts.
As you can see I have also enabled full skin binding and persistent sub-D, my regular sub-d level is usually 0 or 1 when posing, the tests I did were at sub-d level 1.
You have a 460 with current drivers? See that box that says Display Optimization?
Set that to best make sure backface lighting is off and try again.
Now note not all video cards are created equal. Some of them even lie, to software, about what they support. So if that change causes DAZ Studio to be come less stable, highly doubtful with a 400 series or newer nVidia card, please set it to better, and if that doesn’t work please go back to none.