screen issue

 From:  Dexter (DEKKERBJ)
Hi Michael and Moi fans,

I just reinstalled the latest moi beta (november) and after using it for a few minutes, it gets into trouble redrawing the views. If i just mouse over the screen, doing nothing else, the screen redraws in all sorts of wrongness, zooming in or out, going black & white, losing the grid, you name it.
Maybe it's the document, i've attached it (not a professional user, you'll notice). Can anybody give me a hint? I'm sorry I don't know how to video-screengrab the phenomenon.