Glitchy Textures

I had a problem when devblog 61 was made live where the whole screen would be completely glitchy with purple, black, and white flicker. (Screenshot: http://prntscr.com/7am6lv ). I hoped that devblog 62 would bring a fix but it does not. However when I select DirectX 9 it is playable but laggy where it is usually very smooth. Yes my DirectX is updated.