Blocks not displaying correctly

Besides that a game that works on your previous build on this Beta encounters errors,
Many blocks are distorted (attached).

As a constructive note, a professional programmer that is giving us a hand with some coding  was a bit shocked that it seems you've changed your scripting API and your notice about it was light on such matter.

I've never seen this sort of thing happening before. What were you previously using? Could you post your logs?

Could you be more specific about the changes to the scripting API that surprised you? We haven't changed the public API in any significant way since 3.0 went out, and that was over a year ago.

Bump - are there still problems with the beta? Could you elaborate on the other comment?

Problem went away after different trials and shutting down everything and re-booting