Whenever I load the latest motion adaptive avisynth 2.52 script into vdub or vdubmod, I notice that the colours look all wonky when I hit the play button (with the little 'i' next to it). However If I step through it frame by frame by pressing the right arrow key or hold down that key, the colours look fine. I suspect it has something to do with the YV12 input of avs 2.52. Does anyone know what's causing this problem, and is there a way to fix it?

the source is not interlaced?