ZBrushCentral

zbrush display draw problem

Hello.

I have just updated to zbrush 3R3 and I am having some weird issues. When I sculpt on a model with quickdraw turned on everything works fine. If I turn it off I get this redraw issue. Please see image.

I have tried to turn of quick and dirty edit in fact I have turned everything on for multithread etc and it doesnt help. I searched the forums and I only see this issue coming from 2004 or so.

Please help.
Thanks
J.

system specs.
Vista Business 64 bit
8gb ram
Quad processor
Nvidia Quadro FX 4600