That looks like a display driver issue to me. Can you update your graphics card driver and see if that helps as a first step. If not, please post a screen shot of Options>Rhino Options>View>OpenGL so I can see the card and driver date.
For any large files you’d like to send over for explanation, you can use http://www.rhino3d.com/upload and describe the issue in the note attached. This will go into a shared tech support pool internally at McNeel. If there’s a bug we’ll repro and get it filed for the developers to look into ASAP. Thanks for your feedback and let me know how the display driver update helps please.