Sm Actors 'flashing'

[Hellclown]

I load up UDK and all of the Static Mesh actors flash almost like I'm rapidly pressing the W key to show/hide SM's. I installed UDK last night on a new computer, not sure if I missed some redistribute or if I need to re-install UDK to fix some kind of error. I'm on the May 2012 version. this problem seems to happen across all maps I load. It does stop when I press the W key or turn off Real-time view.

EDIT: I ran the UE3 redist install and the problem persists.

My Video card is the only non standard component in this computer. Radon HD 3400, the computer itself is a Dell Optiplex 760 running the latest version of XP with all updates installed. I have more than emough RAM to Run UDK (4GB) and a nearly empty HDD.

This issue makes the Editor all but unusable.

[Hellclown]

I uninstalled the May beta and reverted to the March beta, the flashing problem is gone, does seem to run a little slowly than I'm used to.

[Lorcan13]

Had the same problem with ATI radeon HD 3870 X2, May was broken, Feb version worked fine.