1.1.3 t2dShape3D causes Flicker?

Hi everyone,

I've been experimenting with the t2dShape3D objects in 1.1.3. Basically, I thought I'd try to do an asteroid belt of 3D rocks. They load just fine, but I occasionally get these severe screen flickers that I never got before. It often makes it look like the game is crashing, but the sounds in the background indicate the game is still going on and it's just the display that's messed up. Anyone know what causes this? Or how to fix it?

Thanks.