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.